ResMed Airfit P10 Vent - Performance over Time

I would be concerned that the needle might damage the plastic, unless it's a very fine gauge.
I would recommend Efferdent, like 49er suggests, pressure wash with an oral irrigator (like me),
or clear it with a fine steel guitar string. {{{Efferdent is easiest}}}
My first P10 (bought in April, 2014) is as good as the newest.