I've been using a damp warm towel instead of sitting under the dryer lately just because I can freely move around with the towel on my head. But feel free to sit under the dryer when deep conditioning if you like. Here's how I prep the towel:
1. Wet the towel in the sink
2. Ring the crap (water) out of it
3. Zap it on a plate in the microwave for 3 minutes
BE CAREFUL THE TOWEL IS HOT!!! When you take it out of the
microwave, hold the plate. Then I recomend unfolding it with the
tips of your fingers mindful of the steam coming off. When you can
bare it, wrap the towel around your head. You may want to double
it over.