Cleaning your equipment

Hellooo!
Well my crossfader just went mad (if i touch it even a little bit, it goes to left...) and i though i should clean my U-Mix Control Pro but when i had taken 3 screws off i wondered if there is better way to clean or maintenance DJ equipment? and is it possible that if i send it to reseller i get new or they will fix the problem?
soo tips to clean and answer for the crossfader appreciated :3
Well my crossfader just went mad (if i touch it even a little bit, it goes to left...) and i though i should clean my U-Mix Control Pro but when i had taken 3 screws off i wondered if there is better way to clean or maintenance DJ equipment? and is it possible that if i send it to reseller i get new or they will fix the problem?
soo tips to clean and answer for the crossfader appreciated :3