My machine is so new, I don't expect the filter to be a problem. I clean the entire system and mask, all parts separately, each time I use the machine - although there is always the possibility I'm doing something wrong.
My stuffiness is at night. I have been on www.cpaptalk.com and there are a lot of people on there with helpful ideas. I'm just trying one option at a time until I find something that works.
I refuse to use affrin continuously... I know that's an addictive medicine.
Thanks for the ideas