i get mine done at the salon since i relax at the salon too.
she's done it all different ways and i never pay attention anymore. but from what i do remember:
after a DC, she applys the rinse. then sits me under the dryer for a lil while longer, rinses out, then she uses another product (prob a rinse out cond.)
there were times where she dc'ed and put the rinse on at the same time tho
*i have a clear rinse on in my avatar pic