Hello all.....I hope everyone is enjoying their time off .....probably tinkering on an old grill in the garage with cookies and hot cocoa...or the like. Usually I am not restoring grills this time of year but I still haven't stopped and it doesn't look like I will anytime soon. It has been slim picking's around here so somehow I have ended up with 3 NG's and 1 propane grill currently. So my question of the day which I have yet to figure out is how to remove the deeply imbedded mold or grease from the rubber portion of the Genesis 300 series knobs. I am hesitant to soak the entire knob in bleach/water mix due to the nice red paint still on the kettles. While the wife wasnt around I stood at the kitchen sink with QTips just experimenting with applying a strong bleach mix to the dirty parts of the rubber.....I gave that about 30min of just working the bleach into the rubber the best I could but I saw very poor results. So....is there a magic trick?