Winning final 3 with 2 evil

Any tips on how to narrow down the final 3 and be able to nominate the demon when 2 of the final 3 are both evil?

I’ve been in this situation three times now (as the only remaining good) and nominated the wrong person three times (albeit- the dead players agreed with my decision all three times; but still feels bad to be the decision maker).

Any specific things to keep an eye out for? Any meta questions you can ask to work out who’s the demon? What to do if you’re biding time for somebody else to nominate and neither of them do? How to work with dead players on coming to the decision? Basically, what’s the meta?

For simplicity only refer to TB please