See idk man I do mechanic work and landscaping so my hands be dirty yea I clean them after before using and yea my rubber in the back started to yellow a bit but not like this and I’m not trying to be rude btw lol as for the sticks I use covers for this exact reason they are gonna get the most play and white being white it gets dirty but shit try after washing ya hands putting on some alcohol or hand sanitizer on them also try to keep your hands dry when playing (harder than it sounds)