For gortex, just follow the directions. I was with a mild detergant that does NOT include a fabric softener. Through in the dryer on low for 30-45 minutes and then spray a bit more Nikiwax on it. They get cleaned about 2-3x a season. The nikiwax smells a bit, but it goes away.
Never use bleach or fabric softener on hi-tech clothing. Even powdered detergant like oxy-clean has a bleaching agent in it. Read the friggin labels.
Merit 25 # 764 "Audrey"