I have looked and cant find anything so far to work. I have some soft supposed to be white bmx grips. I have tried bleach, dishsoap, oxi-clean, l.a.s totally awesome, tide,simple green, the purple stuff, throwing them. Nothing is getting the black stuff(possibly grease) out of the little grooves in them. I have about 2 - 3 hours of scrubbing them , 20 hours of trying to bleach them and about 4 more hours trying everything else. I dont want to buy new. They came on a rare bike and im going to use them. I just want them somewhat clean. Im open to any and all suggestions. Im thinking og getting out a pot and torch and filling the pot half full of bleack, half full of water and boiling it outside. I know it will create fumes thats why im wanting to do it outside. Any advice or suggestions is greatly appreciated.