YMMV, but I'm washing about 6 CCS and HT pads used in today's detail and a bucket full of MF's right now. I find it takes 2-3 washings with APC then unscented regular detergent for them to come clean.
Then the pads get rolled into a thick terry towel to squeeze out the remaining water, and air dry.
I wash my waffle pads all the time now...... and tumble dry or toss them on the Makita and slowly turn it up to 5 or 6 - if you turn it up instantly your pad will sling off the machine - Im guessing the water weight throws it off. I use Arm and Hammer with oxy clean detergent - works great.