The top surface is effected 1st which then deepens and deepens until you could wipe the entire rubber off with cloth after 25 years.
Clean sticky rubber grip.
Swish the water with your hands to thoroughly mix the soap.
Dampen a wash cloth with hot water and wring out excess water dampen wash cloth with oil soap full strength and clean remote or sticky plastic.
Once the isopropyl starts to dry and you find that the cloth is sticking to the rubber it s time to add another layer of isopropyl.
I put it back in the case and stuck it back in the closet.
Quick video on how to clean old plastic or rubber that s deteriorated and has become sticky and or oily.
Use a clean section of the cloth each time.
Keep re applying on the rubber and rubbing with a cloth.
This is why they were sticky.
Step 2 dip a cleaning rag or mop into the soapy water.
Like 50 year old tyres using alchohol will merely disolve and strip the top liquid rubber layer off back to the still rigid rubber underlayer.
Murphy s oil soap and done.
Upon some research i found the rubber coating on the grips deteriorate over time.
More rigid high vulcaising rubber will powderise back to dust.
Rinse wash cloth then wipe remote repeat should be free of any sticky.
Rub the paste over the surface with a cloth then rinse clean.
Again use fresh clean rags for each application allowing to dry rinsing with water between each application.
If the sticky damaged surface remains mix some baking soda with water to create a thick paste that is about the consistency of toothpaste.
After the final step gbg application you should wrap in damp towels leave overnight and make sure the gbg is completely removed.
Tried dish detergent but that just pushed the sticky around.
I pulled out the camera several times over the last year and every time my hand stuck to the grips.