You could try elevating the bed head.

Reason being, my step dad is a chronic snorer. Tried the mask, the laser surgery - even cutting back some bone in his nose from where it had broken years ago and not reset. The laser worked for a little while, but he started snoring again. Mum read/heard somewhere about putting a brick under each of the feet of the bed at the head of the bed, so she did. And he doesn't snore anymore.