I've often found the tank dunk doesn't always work as well as I'd like. Sometimes I'll lay the suit flat on a table that is on a slant (like in a driveway or something) with the head/arms of the suit lower then the legs. Then I'll take the hose, stick it in a leg and turn it on. The constant flow gives it a great rinse and you'll see water pouring from the neck and arm holes. After a bit, switch to the other leg to ensure that one is rinsed. I dive ocean primarily, so this is a great way to pull the salt out
Then make sure you hang it inside out and get it completely dry before turning it outside in. Also, good airflow is important if it's a bit damp inside. Something I normally use for BC pockets, but works on wetsuit arm holes/leg holes is to take some plastic water bottles (the 16 or 20 oz size) and cut the bottoms off. you can use these to keep the opening open so that you get good airflow and it can dry without getting nasty. Just make sure there are no sharp edges so you don't cut something.
