The dish washing powder does not wash out completely unless the machine is set to heavy duty only. we will often open the machine at the end of a wash cycle and see the soap powder all wet and soft but not dissolved. Note: The machine is still under an extended warranty.

The heavy cycle typically takes a long time because it includes a short soak and prewash. The older hot fill washers were quicker but used more water while the newer cold fill washers are claimed to use a third less water and so need to take longer over the wash.

The heating of the water also adds time to the cycle. Modern detergents work best, the manufacturers claim, with a rising temperature.

Common Problem

1. Confirm the wash water is hot
   1. Try heated wash(sani wash) if available
   2. Run hot water in sink to warm up before starting
   3. At least 120 degree Fahrenheit water temperature
      
2. Open door check wash arm position start washer for a minute
   1. Confirm wash arm has rotated
   2. Check for plugged spray tips at either end of wash arm.
   3. Use small tweezers to remove
   4. Check for rack and dishes interfering with arm rotation
3. Place cup in upper rack with opening up cycle washer.
   1. Confirm that cup quickly fills with water
   2. Not washing check water level in tub mim 1 1/2 inch
4. Discontinue use of rinse/dry liquid additive.
   1. Confirm rinse/dry additive not leaking from dispenser into tub
   2. Washer detergent contains sparkle additive and too much sparkle/rinses/dry additive will coat dishes
   3. Try alternative wash detergent that contains minimal rinse/dry additive and use without liquid rinse/dry additive.
5. It will take several wash cycles after the elimination of rinse/dry to purge the oily film from dishes and machine..
6. If success "joy" is achieved with no additives then cautiously add back wash detergent with additives. Additives are important to facilitate drying and protecting the glassware china from leaching. The leaching process permanently etches the surface of glassware leaving a cloudy appearance.

Try to remember the clothes washed prior to this showing up stuck to the drum. The source was something likely left in a pocket. Examine the clothes carefully for the same residue.
Try a small amount of liquid dish soak on a rag and see if it will dissolve into the soap. If not than it may be a silicone base material (black sealant) from something included in a prior wash. Unless there has been plumbing done recently at the house and if no other sink has shown similar characteristics you need to assume that it came in with the wash load.

I would load up the machine with rags and old work clothes set water level to full load set to heavy duty and hot water, Double up on the soap and let the machine do the work of cleaning. It may take a few cycles and a trace residue may always remain.

This sounds like what the service manual calls "scrud":
"If fabric softener is used regularly it will eventually cause a build up within the outer basket. This can result in black flakes present in the wash load that can stain garments. To remove scrud follow the procedure below.
Step1: Add a full cup of a good quality dishwashing powder in to the machine.
Step 2: Set the machine to a Heavy Duty cycle, select a Hot Wash temperature, High Water level and allow the machine to agitate for 10 minutes.
Step 3: Leaving the lid closed, turn the machine off and allow to soak overnight.
Step 4: The following day, turn the machine on and advance to the spin cycle to drain the water from the machine. After the water has drained, turn the machine off then back on again, and select a Heavy Duty cycle, Hot wash, High Water level, and allow the machine to complete a full cycle to ensure that all of the loose scrud and residual detergent has been flushed away.
Note: If there is an extremely heavy build up the above procedure may have to be repeated." (emphasis theirs) (http://www.applianceaid.com/pdf/517792A-PH7-USA-Eco-Washer-Service.pdf)

You said you cleaned the machine already, so maybe you did this step, but I thought it might help.

if the machine wont take in the powder
then the machine has no cold water supply
so this is caused by a few things

1} there is no cold water turned on to the machine
or there is a heavy pressure drop in your cold water supply too your home
2} the inlet filter is blocked solid the filter lives at the machine end of the cold water inlet hose... and you use a flat nose pliers to remove it for cleaning
3} the cold water inlet valve has failed
so it never opens so cant wash the soap from the drawer too the drum

i would get a tech too look at it
check the filter and also replace the valve if needed

2.13.1 Scrud
If fabric softener is used regularly it will eventually cause a build up within the outer bowl. This can
result in black flakes present in the wash load that can stain garments. To remove scrud follow the
procedure below.
Step1: Add a full cup of a good quality dishwashing powder such as Active or a similar product
into the machine.
Step 2: Set the machine to a Heavy Duty cycle, select a Hot Wash temperature, High Water level
and allow the machine to agitate for 10 minutes.
Step 3: Leaving the lid closed, turn the machine off and allow to soak overnight.
Step 4: The following day, turn the machine on and advance to the spin cycle to drain the water
from the machine. After the water has drained, turn the machine off then back on again, and select
a Heavy Duty cycle, Hot wash, High Water level, and allow the machine to complete a full cycle to
ensure that all of the loose scrud and residual detergent has been flushed away.
Note: If there is an extremely heavy build up the bowl will have to be removed for pressure washing

Step one: Identify the source. Try switching to a high efficiency powder detergent instead of liquid. (Suds collect in nooks and crannies.)
Step two: Clean. First wipe the inside of the washer, especially the area where the door seals to the inside. Mold can collect around the insides and folds of the rubber seals. Get in there and make sure you cleaned it all. You could use bleach or Pinesol.
Step three: Use a quarter cup of dish washing detergent (powder is best, liquid if you must), along with a towel. Put the machine on the "sanitary" (hottest water) setting. Let it finish its cycle. This should get rid of the mold completely.
Step four: Leave the door open between wash loads. This will decrease the mold build-up as it allows the tub to dry completely
NOTE: IT WILL TAKE 2-3 WASHINGS TO TOTALLY RID THE CLOTHES OF THE MUSTY SMELL.
Hope it helps!

Use a s.o.s pad to remove mold there will still be staining but it will gey the bulk of.Now to get rid of the smell ( this has been a mixture I have used for about ten yers works every time) put the washer on hot heavy wash start when done filling drain what you want to do is make sure the water is the hottest it can be. now start washer again on hot wash when you see water in bottom of tub stop machine to open door ADD two cups of dish washing power( brand does not matter I tell most people to buy cheap stuff at walmart) start machine let it run till you see powder disolve then stop washer and add 1 cup bleach. let unit go through complete cycle..If your washer has a clean cycle use that instead of the heavy or normal cycle. The most I ever had to do this treatment was 2 cycles and it worked every time.Note all front load washers the door must be left open to pervent odor/bellows should be wiped clean after each use/and a good cleaning at least once a month. anyhow if this helped please vote if you need more help please ask

NOTE the dish soap is the stuff for a dish washer

Using powder in the pre-wash (open) tray is recommended for heavy loads but may not be required if the dishes get clean with powder in only the wash tray.

Try the combo liguidgel powder packets and wash on the potscrubber plus setting. We saw a drastic improvement with this setting. I have just about gotten out of the habit of thorough pre-washing, but I do rinse heavily soiled items.