I have a few various microfibre towels (like some of those listed on this web page ) but have only used one up to now.
No tried to wash it in my washing machine...

I also put a few Compact towels in every EDC kit, car kit, hiking backpack, bike kit etc I have.
+ I gave a few to some friends.
Just as a small light, like a Photon, is just too small not to have along, such a tiny emergency towel should go in every EDC pack or purse...