Hair product advice please 4 fine hair

I have very fine hair naturally and trichotillomania doesn't help! : ( every single gel product I've tried leaves hair looking dirty and or greasy. If anybody with similar problems has found a product that works great PLEASE let me know! Please include the name & brand or a URL. Also ALWAYS looking for a volumizer mousse if you know of any!

Many sincere thanks!!

Sincerely,

Slightly Balding Blonde