Not sure. Left a VM with my technician and am hoping for good news.

Hi everyone- I've been a successful CPAP user for a while, but am on my 2nd machine (both Resmed, a 10 and now an 11). I had a SoClean hooked up to my 10 and noticed it slowly stopped being as effective...tried every cominbation of mask, settings, etc...and also it was making whistling-ish noises it...