CPAP nasal pillow

After 6 months use I cannot get a good seal, any advice?

[Nannarls]

I boil my nasal pillows for 5-10 minutes with bi carb soda in the water. It loosens up the natural oils and hardens the silicon again. Also I made my own elastic harness to keep it in place. It certainly isnt pretty but Ive made it adjustable so I can easily tighten it when it stretches. At $59AU, I cant afford their replacement. Ive added a slot in the top one where I pull my pony tail thru so it stays in place. I hope this helps. Good luck.