I have 4 atomizers that I rotate between each day and every night I rinse out the one I was using and let it drain. Also once a week I put them all in a coke bath. Even with all of this all 4 of my atomizers stopped working this week :/ I've tried the coke bath, hot water and even soaked them in denture cleaner for a bit and nothing...anything else I could do or do I have to just buy replacements?