Thanks for the clarification. Unit is 4+ years old so already out of warranty. Knowing that it’s just sound deadening foam, I can replace with foam of same thickness and density. I also hear you on stopping usage of SoClean and will await the class action lawsuit that sure to come.

Was getting pieces of foam blown into the water tank. Disassembled and found that 75% of the round foam filter at the top of the air pump housing had disintegrated. I think it was caused by ozone from daily sanitizing using SoClean. I reassembled without the filter in place but want to buy a replace...