I snore. The not-quite-flat seats seem to make the situation worse.
A very nice FA woke me up on an EWR>DEL flight to let me know I was bothering those near me. She was incredibly polite and apologetic for waking me, and suggested that I might be a bit dried out and that perhaps a little water might help. She had a bottle with her.
It did help. When I went back to my nap, I asked that she please wake me if I again bothered others. She agreed, but I managed to doze off without bothering anyone else for the rest of the trip.
I get the feeling she'd had to do this to other passengers, but she handled it in an incredibly respectful, polite and discrete manner, which I greatly appreciated.