I realize we are talking darkroom towles, but just a tip about washing things you don't want in the regular laundry. I use a 5 gallon(us) bucket and fill it 1/2 way with water and washing solution of your choice and put the lid on tight. Place in the trunk or back of your car and as you drive the motion creates an agitation effect. I use this on location when I have fallen in mud or a stream and my clothes are covered with mud and who know what else. Work great for me.
Just a tip.
p.s. yes, I tend to get dirty while trying to find the right angle for a photograph.
"He who expecteth nothing,
Shall not be disappointed." Robert Willingham, 1907