I massage them in degreaser then spin them on the rotary and let them air dry. .
THIS!!!!
Any problems using Dawn Dishwashing Liquid?
Nooooooo.... do NOT put dishwashing detergent in them, you'll NEVER get all that out.
If you have some APC (all purpose cleaner) you can spritz them with that and massage it in. BTW, you REALLY want to find an APC that you like, and use it... use it a LOT. My all time favorite (was) Meguiar's APC+, yet for SOME STUPID REASON they discontinued it.

I still have about 3 quarts of it, but REALLY ration it.
Duragloss APC (that AG sells) is pretty darned good. And affordable too!
You'll want to keep two spray bottles with your favorite APC. One at max strength, another at general purpose strength. Depending on the APC that might be one at 10:1 and the other at 20:1.
What REALLY works well for pad cleaning though, especially when you're doing small amounts of pads by hand, is Meguiar's DynaCone cleaner. Autogeek also has some, several of which I've used. They're mostly the same thing, just different colors, different prices. I mentioned to ya' yesterday here at the house that CarMomma found the DynaCone locally at Ollies for only 99¢!!!!! :dblthumb2: I have to give the credit for finding it at that price to the discount thread here on AGO.
*Just did a *G* search and it's as high as $18.74!!!!! She said, "
OMG if it's selling for that much we're selling ours, I can get more, lots more."
What I do is spray cleaner on them, (maybe some APC and pad cleaner) and massage it in, then brush a bit with a medium soft brush. Then go back to the first one and start rinsing with HOT water. It helps if you have a mud sink, and also a short length of hose connected to the faucet. With the hose you can squeeze it (like when you're spraying a car or the lawn) and get a high pressure spray.
With the hot water, a good stiff spraying, and a bit of massaging you'll get them totally clean in short order. Once clean, rinse, rinse, and rinse again. Then put them Velcro side to a folded towel and roll the towel over to the foam side, the roll the pad up inside the towel... and give a good squeeze. That'll generally make them dry enough to where they'll dry sitting on a shelf, Velcro side up. Remember I mentioned yesterday that you want to sit them on something so they get air underneath. That can be a gallon milk jug cap, a spray can cap, fabric softener, or pretty much any type of cap.
What makes AWESOME drying spacers are the little things that come in pizza boxes!
They also make great cooling spacers for electronic equipment like routers.
