I don't know the reasoning behind Franco's suggestion of soap, not detergent. Depending on minerals in one's water, soap can be problematic for cleaning and rinsing. That is one reason detergents became popular.

I will toss out the suggestion to use Atsko's Sport wash on your tent. Is is supposed to leave no residue and has no perfumes or dyes. I know that I sound like their paid spokesperson, but I assure you that I am not. After testing some Atsko products for an on-line review site, I was truly impressed with them. I use Sport Wash now for our whites and sometimes other laundry because of skin sensitivity issues. When my son was a firefighter, I washed his turn-out gear in Sport Wash and had the same great results as I've had using it on anything from my camping/backpacking clothing and gear to a silk dress that was covered in bugle beads and bore instructions to "spot clean only."

CM