I had a SoClean 2 and now a SoClean 3. As someone pointed out, the machine only cleans bacteria and viruses not dirt and oils. I soap and water wash my equipment about once monthly. I should probably do it more. I know that ozone decontamination is effective. I’m going to trust from studies that this machine does what it is intended to do. As for the smell…. There is a noticeable ozone smell that dissipates within 10 minutes or so. I personally have never had an issue with the smell, but others might.