Take apart handset to clean keys

you would be better off going to an office supply store and buying one of those cans of air and cleaning it off that way. Taking your keys out makes them weak and they wont be the same, It will ware them out, I wouldn't recommend taking them off.

Open the hand set by Removing battery, remove 2 screws under battery, carefully open handset casing by prying open with thin bladed screwdriver, remove pc board by removing 3 retaining screws, on opposite side of pc you will see contacts for handset buttons clean with eraser and reassemble handset.

Taking It Apart Can Void The Warranty. I Suggest Taking It In.
(Don't Tell Them You Had It Apart!!!)

usually keyboards are pretty simple to clean once you take them apart.

There is a rubber (normally) surface with some black conductive poins under each key. un screw the keybard clean the contacts and put it all back together.

Note: be careful certain keyboards do not have a way of "holding" the keys in place once you take them apart. So if you arent in the mood of putting a big puzzle back together and losing 30 minutes rearranging keys (wheres that damn ~ go again?) be very careful as you pull it open.

send it to the manufacture caustamer care and replace it.

u need to open phone and clean board with soem alcohol or soem strog parfum. Its work for me.

I had the same problem until today. This is what I did:
I opened up the handset and took most of it apart:
There are 2 screws in the battery compartment and you have to push something in on the sides to pull it apart. It won't come completely apart because there are wires connecting to the speaker. There are 5 screws on the inside that hold the board to the phone. I unscrewed those. The buttons are all on 1 rubber sheet. The problem is that the 4 metal connectors under the 4 way button (not on the board, the ones on the back of the rubber) have somehow deteriorated. To fix it I glued a very small piece of tin foil (I used a really thin brand) to each of the 4 connectors. They have to be done separately and the foil can't be too thick or the foil will be touching the board without a button press (found this out the hard way). Test it before tightening the screws to make sure everything worked and then put it back together.
Note: You may need to ground yourself so static electricity doesn't fry the board. If it breaks the phone, don't blame me :) I went this route because it was either play around to find a solution or buy a new phone. I don't know how long this will work for, but I hit all the buttons a bunch of times and they all work.

Unplug the battery. Hold down The * (star) and the #(hash) keys simultaneously. Re-connect the battery, phone will beep and screen will be blank. Press the voicemail (righthand silver key under the lcd screen). As above EEPROM/RAM message will appear. Place handset on base and your problem is solved.

The weakness with the handsets was that women using hand lotion or hair gel can get it on the front of the keypad. It then works it's way to the back side of the rubber keypad. The oil gets on the powder carbon on the keypad. The Carbon shorts the copper on the phone to activate the #1 or #2, etc. When the oil mixes with the carbon the key no longer works. I replaced many keypads until Sony Supplies ran out.... A cheap home fix would be to open the handset and clean the #1 key and the circuit board. You can try the keys but if they don't have any carbon on them you can buy liquid carbon at Electronic Stores OR just paper punch a circle of alumimum foil. Glue the foil on the key with thin glue. Works....

AL

Uniden TRU 8888Handset Reset (De-Register): 1. Remove Battery. 2. Reconnect battery while holding down "*" and "#" key. 3. Then press the right upper soft key under the LCD. 4. Press the "End" key. 5. Phone will be ready to register to the base.