I cleaned some 5/16"-24 TiCN coated High Speed Steel Taps for use around UHV. These taps are stronger and more durable than the taps in the tap set. I did a 90 second bath and sonication in Simple Green:DI water (1:30) and noticed a few particulates come off (I don't think it's the coating as the coating looked intact, but I didn't want to risk stripping it, hence only 90 seconds). I brushed the taps, washed with DI water, did a 2 minute sonication in a DI water bath, washed with isopropanol, then did a 2 minute sonication in isopropanol.