What brand of disposable nappies are you using??

I had the same problem with my son, I've found that he doesn't leak through huggies, I change him just before he goes to bed, even if he's asleep and first thing when he wakes up. I have also found that he doesn't wet as much now he's older.

I'm unsure of any liners someone else may be able to help you on that one.

Good luck,
Snoopea