Once the float doesn't work, just give up and save your chips. I know from personal experience that trying to win hands by making people fold is very very expensive. You took a shot which is fine, but it didn't work, so that kinda officially makes it a bad spot now. Just move on to the next hand.

BTW, and I bring this up because I'm a recovering lagtard. Have you ever tried to play a couple sessions with no bluffing whatsoever? It was way harder than I thought. Turns out that a lot of my bluffs were not good ideas that just didn't work out. They were actually emotionally driven stuff that I had little control over, at the beginning anyways. Not bluffing much is not as much fun but it is much more profitable.