I don't know that I'd apply it directly to a reptile but people do use it to control mites.
I used it on the substrate and tub of some ASF's of mine that picked up mites. It was not used directly on the animals and was allowed to fully dry before they were placed back in the tub. It worked great, killed the mites quickly, and caused the ASF's no visible problem - even with a litter of week old pups. If i remember correctly, it has the same active ingredient as the reptile spray you can buy.

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