my door was squeaking,
so i sprayed dry lube on the hinges;
squeak went away
few days later- there is a much louder squeak and door is hard to shut all the way.
any ideas on what to put on the hinges?
The WD40 didn't cause the problem. Something is wrong, you will need to take the hinge pins out and see.
The WD40 just let the problem continue and deteriorate.
If you are unsure about pulling the whole door, try taking one pin out at a time. You can then clean and lube the one pin and push it back in, move to the next. Or replace it, as needed. You can even do a hinge one at a time. If you have only two hinges you have to fasten the door with something else, but I am suspecting this is three hinge door.