My OH is pretty bad- and getting worse.
The best thing is for her OH to lose weight. Snoring gets worse the heavier you are, especially in men. A Collar size over 17" substantially increases the likeliehood and severity of snoring.
However, that may not be an option, and isnt going to help short term.
The only thing i have found that worked and might be worth a try for her is a gadget that the snorer wears in his mouth over night. Its pretty much like a mouthguard that rugby players/boxers etc wear. It keeps the palate and jaws firmer, straight and aligned, which reduces the snoring.
I found it lessens the noise when he is on his back, and pretty much gets rid of it when on his back or side.
The expensive ones cost �100 or so, so you might want to try a cheaper one to start off with to see if it helps.
Mine was a goodsend. i'd almost got to the point of despair and insanity from lack of sleep!
I got his on ebay. Not from this seller, but it shows you what to look for!
http://cgi.ebay.co.uk/Stop-Snoring-today-with- Sleepguard-Snore-Mouthguard_W0QQitemZ170310105 438QQcmdZViewItemQQptZUK_Health_HealthCare_RL? hash=item170310105438&_trksid=p3286.c0.m14&_tr kparms=72%3A1688|66%3A2|65%3A12|39%3A1|240%3A1 308