Thanks!
Yes, he is already using breath right strips, but apparently they wear off after several hours--which is why it takes until 1-3 am for the snoring to wake me up.
I haven't tried earplugs lately--the only kind of I've ever tried to wear (for other reasons, not a snoring partner!) were those foam yellow ones, and I found them really uncomfortable. i'll look around and see if I can find better ones.
He actually has had a sleep study, several years ago, and was given one of those machines with the masks to wear while sleeping. He hasn't used it in a couple years, I'm not even sure if he still has it.
Thank you for the suggestions!