Easy there, you might still get another borp.
Are any more pipped? If it's not pipped, you can run your shower or a humidifier until the bathroom is full of steam, and take the whole incubator in there for quick opens to grab an egg. Sniff test - smell okay? Then listen for the little to be moving around in there. Candle and see if you can see any movement in the aiirsac.
Seriously, though, if you can contain yourself to wait a couple more days first, that would be better.
The float test? Remember that eggs are porous and you could drown a chick like that. But ... I know I've seen on here where someone put an egg in a shallow bowl of water just a tad warmer than the egg (as I recall, because heat expands and you want the egg warming in the water and pushing air out through the pores, not cooling and sucking water in) just deep enough to float/balance on a tip, and look for ripples indicating that the baby is moving in there.
The other float test is about eggs having gasses from decomposition in them, I think, and is total submersion and, to me, too risky for a possible baby still coming.
Again ... I have read about hatches on day 27. I know it's hard to be patient ...