Those S&M grips used or is the grime on the outside of the packet?
The packaging has an opening in it, so that you can feel them try before you buy, in the shop. This opening has caused them to become dirty before they were used, in my parts bin.
A bit of isopropyl alcohol might clean them up?
@NurseHolliday started
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Those S&M grips used or is the grime on the outside of the packet?