Rubber coating breaking down
Try it with rubbing alcohol first - just keep it away from the optics, and you may get lucky.
The only thing that ever seems to work with these is an abrasive cream cleaner (jif/cif or similar) - you just have to use lots of cream and be careful not to polish the optics - unfortunately the stickiness will come back quicker than before though.
I haven't tried myself, but i have heard that once you have carried out the cream cleaner routine, you can paint the unit - ask your hardware shop what sort of rubbery paints they have - ideally oil based and not acrylic. It wont last as long as the original finish or like quite as good, but it should stop the stickiness for a while at least.
Try and keep your binoculars out of the sun - most of the stickiness is either caused by that, or contact with a damaging chemical such as most insect repellents, or petroleum products.
Hope this helps :) Read More At : Elite 8x22 Binocular...