Only had to clean once and no problem. I noticed that some other reviews said they couldn't tighten the hose on the hose so thought I'd post a photo of the one I installed. This should be self-explanatory, but for less savvy people, don't remove the knobs from the diffuser. Instead, tighten towards the main body and then place the tubing you wish to use onto the sleeve. Then tighten the handles (from the main body) on the hose. I'll buy a second one just because I know it won't last forever.
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