I'm glad this product is giving you volume! Sorry to hear things failed a little on the 2nd day. KCCC does for me what you're describing: gives volume and boosts curl but doesn't quite "keep". I have to add an additional product (gel).

Since your hair is fine, this recommendation may not work, but I'll put it out there anyway: Have you tried placing a light gel over it, or a tiny bit of coconut oil as a sealer? Obviously it'd be better if you could just use the foam and not have to layer products
3b/c?

Ringlet Fandango! ... Where curly ideas roam free

* 2 blogs this week: Pictures of My (Sorta) Big Chop! AND Turn a Nightmare Product into a Dream* My Albums