I have oily skin, also, so don't notice dryness around my nose. My C Pap has a humidifier and there's a heater in it, but I can't use the heater because the machine starts "sputtering water" if I turn it very high, so I have to turn it down and use it that way. I'm supposed to dispose of my filter and nose pillows every 2 weeks and I get a 3 months supply from the company that I got my C Pap machine from...also new head gear, hose for the machine and the small hose that connects to the head gear. I wash my head gear in the washing machine in a mesh bag and air dry it...works for me. I don't wash it often, just when I think of it and I leave the fabric covers on the headgear and it doesn't usually come off, but if it does it stays in the mesh bag. Also, the instructions for my machine said to use unscented shampoo or dish detergent to wash all the attachments and the thing that holds the water and I couldn't find the unscented anywhere, so for a while I used just plain vinegar with a 3 parts water, 1 part vinegar ratio...until I discovered that All detergent makes an unscented detergent, so now I'm using that to clean my attachments, etc. in! Sorry this is so long, I ramble sometimes!