Fruit slime as baby hair gel
If that title didn't grab you, you're a stronger parent than I.
Erin's hack requires no preamble:
My 11 month-old daughter's hair is just long enough to get in her eyes, but not long enough to tuck behind an ear. I don't really want to start cutting her hair, so I've taken to using a tiny bit of banana or kiwi slime as baby hair gel. I just rub my fingers over the fruit until they are a little sticky and then finger-style her hair back away from her face. That's all you need. It's effective, convenient, and cheap!
I asked if it washed out ok, and here's what Erin said:
Oh sure! In fact, I got the idea from her grabbing her own hair while her hands were covered in fruit slime. Whatever she grabbed and scrunched in her little hand would stick straight up all day long (but wash out of her hair at night). My husband thinks I'm insane, intentionally putting food in her hair, but it's really not even noticeable if you only use a little. It's not exactly long-lasting, but it will last a few hours (until the next meal! HA!).