That sounded dodgy to me but it does look like it's got some legitimacy: https://scientificbeekeeping.com/a-test-of-thermal-treatment-for-varroa-part-1/ https:/

That sounded dodgy to me but it does look like it's got some legitimacy: https://scientificbeekeeping.com/a-test-of-thermal-treatment-for-varroa-part-1/ https://scientificbeekeeping.com/a-test-of-thermal-treatment... I mostly use oxalic acid, but if heat treating becomes viable I'd welcome it on the hobbyist scale.