ok so the residue left in substrate on snake whatever is kosher when they drink it etc if youd read to proper use yo been using them for years properly never had issues with any species of snake or lizard and theyre not exposed to it consistently I've used proventamite.....guess what omg still mites I gave it a try it didnt work for me and well to each his own STOP ATTACKING ME YOU FAIL TO RECOGNIZE THERE WERE TWO OTHER WAYS I LISTED AS WELL BUT NNNNNOOOOOOOO its crap like this the nonsense attacking me no matter where i post heck even a pic that makes me not even want to deal with anyone hear geez