Trying to find a way to sleep well without Quetiapine.

Any suggestions? I was initially on 12.5mg Quetiapine, then gradually increased to 25mg for sleep. It works extremely well and helps me sleep at least 6 hours straight. But I cannot tolerate the mouth dryness side effect that comes with it. I was wondering if someone here could give me an insight to how I can sleep without this horrible drug.