Spare ceramic diffusers for this style of diffuser are inexpensive and very easy to swap out. I swap mine every couple of months and give the dirty one an overnight soak in H2O2 followed by another 24 hours in white vinegar and it's ready to go next time. IMO, this style is head and shoulders above the older UpAqua, GLA, etc. inlines. They're easier to clean, seem a lot sturdier and produce a much finer mist.