scc need to be changed?

[Pierrec83]

Hello
I have been using SCC since 4 months now and it seems to me that the foam is less resisting to chin tucking than before.
Do you guys change them on a regular basis? if yes, on which frequency?

thx

My model is Gibsud SSC

[sheepless]

I'm not that 'regular' about anything but in about 3 years I've had 4 collars and am due for a new one. they soften and curl, discolor with sweat and body oils, even with occasional washing. last night I used one I'd retired at least a year ago while current one was washed and drying. it worked fine so I don't know how much increased leaks, snores, obstructives that led me to retire older collars were actually due to a weakening collar or just part of some inherent variability in me and pap therapy.