You'll probably need a magnifying glass to read instructions like I did. It's pretty easy to use. Charge it up and then insert your toothbrush and close the lid. If you're in the US and don't use 100 degrees too often. The heating plate operates at 60-70 degrees Celsius, which is 140-158 degrees Fahrenheit. Probably a little hotter than any of us would like. However, the device must be connected to the mains in order to be able to use the heating. The Li-On battery only powers the UV light and a small fan. Is it worth $20? Good question. It appears to have a real UV light source as it makes my UV reactive paint glow in the dark, so. The question is; Do we need to kill germs on our toothbrush? I think I will.
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