I bought Wolf Super Endpin as my old rubber endpin protector replacement. It looks like this: Problem is that it slips on my wooden floor. They are not rapid slips, but after a few minutes of playing (especially with a bow), I have to reposition my instrument. It works well on the carpet. My previous rubber endpins do not have this issue. Any tips on how to make it more "hold in place"? I cleaned it with alcohol and dry cloth, but without any significant improvement.