Neb, be patient a little longer. JJMR's thread on the test is in the top sticky I think in #3 response . I think he said like day 21 to float test.
I tried it at day 18-19 and couldn't tell difference on some. But by day 21 it was obvious. The high temp is bad, but if only for a few minutes you might be ok. It doesn't look good but its possible.
If you see any leaking (literally bubbling) get them out and toss them. I had a few bubble around the middle (must have been cracked) my last hatch.
Good luck.
TCollier - just hang in there. Their going to hatch when they are good and ready, not before. Keep the humidity up.
Ummmmm. Normally you wait to float test the remaining eggs untill after the main hatch is over.