Using the proper amount of Micro-Restore the rinse water is usually clear of any suds on the second rinse. As others have said the vinegar helps to release any detergent left in the towels. If I have used some APC in addition to Micro-Restore, on really grungy towels, then sometimes I'll run them through another complete wash/rinse cycle without any detergent to make sure they are completely rinsed free. I have read where some guys had so much detergent built up in their MF's that it took several rinse cycles to get them clear. Pick up some distilled white vinegar at the grocery store and give it a try..... it's pretty cheap.
