The rubber armoring is "melting" or getting all sticky

Contact the importer / distributor and enquire of them.

They are $42 plus post on eBay
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I have had a similar experience with Bushnell(NOT Vivitar). I called them and they offered to replace/repair them for a shipping/handling charge. If I remember correctly it was between $15 and $20. After pricing new ones, this seemed like a good resolution. I sent them in(my cost) with a check for their S & H. A few weeks later I had new ones from the manufacturer. I think there were a few years when the industry was using a "special armor coating" which turned sticky after a number of years.

Many cameras and binoculars are covered with a sprayed on thin layer of rubber which breaks down after about 5 to ten years. It becomes very sticky and can be scratched off with a fingernail. This leaves a messy surface which can be cleaned off with methylated spirits. Other solvents will work like isopropyl alcahol but avoid using solvents like cellulose thinners or white spirit as this can attack the underlying plastic on some cameras.

Response to sticky black rubber armor on tasco futura. I used a product called goof off works well !

I dont know the exzact value, but it will behigh i have a zeiss rifle scope, very expensive, and their great so the price is 3 to 500 dollars

If you have double vision it is out of collimation (alignment of the optical axis). You need to send this to the manufacturer for repair.

Simple use soft lint free cloth like old drying up cloth, you need about half a cup of methalayted spirits,can get this from any hardware store.
poke finger into cloth dip into meths proceed to rub sticky coating off binoculars. you will need to keep changing to a new peace of the cloth as soon as it gets coated with the sticky black stuff off binoculars.
keep dipping into meths eventually after say 6 rubs in a particular area you will see and feel a nice hard black plastic, continue all over effected area then finish off with any window cleaner polish until cloth remains clean.STICKY COATING IS NOW GONE IT WAS INFACT A COATING PUT ON THE BINOCULARS TO MAKE THEM NONE SLIP. job done. regards GER8

The same thing happened with my old Praktica Sport Zoom binoculars, and (in my case) found that the sticky coating could be removed by repeated rubbing with paper towels moistened with methylated spirit ("meths"). SAFETY FIRST: If you decide to try this method and have not used meths before, it is a very flammable liquid, and harmful by touch and inhalation, so please wear rubber gloves and do this outdoors or in a well ventilated place and away from sources of heat or fire. That said, it is cheap and readily available from DIY stores, usually in their painting section.

sorry to be the bearer of bad news but when you buy a mass production product this is what happens. now you have to find someone who can repair them. of course a few people can. but is it worth the while for them to work on it....no....shipping etc. would cost more than the price you paid. sorry [email protected]