I use hot packs to help with sinus infections. Mine don't drain well. Asthma. And allergic to most antibiotics! Wet wash cloth or hand towel real well. Lay flat in zip lock. Don't seal. Put in microwave 3 min. Take out carefully keeping it flat. Close. Wrap in dry cloth. Put on sinus unwrap as cools. Repeat, at first I do Several treatments to break up stuff in sinus's and get it to drain. Then I do it several times a day. Learned from ENT Dr. Not a substitute for medical care!!!