I found tons of info here about cleaning atomizers. One thread said to use isotropy alcohol and one said compressed air. Lock de-icer is aerosol isotropy alcohol - I have a whole rack of it so I tried it. Wow worked great I shot it through the hole in the bottom of atty and could not believe the .... coming off. I then soaked it in Targon mouthwash. Looks like new and Tons of vapor today. Just be sure to spray over garbage can - this stuff has pretty good pressure sometimes.