Hi Lori, you are supposed to clean in soapy water after every use including before you boil for 5 minutes. That won't help with the issue you are having but just thought you should know that. They recommend a more diluted use of vinegar (3 to 1) as an alternate disinfecting method but it is considered light disinfecting. Using straight for the build up from hard water makes sense. See if it helps. Or maybe the new compressor will be the solution. I assume you are changing the filter. The Pari Green is rather notorious for not lasting that long if used twice a day. I think the ProNeb Max is better for twice a day use and it works faster too.