If your Pixie is healthy and you are just doing it's monthly cleaning before returning frog to same tank; there is no need to "disinfect" the enclosure. You can use hot water (wear gloves) to clean enclosure out.

Also, if your water is hard and there are water spots from misting, a sponge soaked in vinegar can be used to clean glass and then rinse after 10 minutes or so. For peace of mind, can also use a product by ZooMed called Wipe Out and rinse the enclosure well after application. Good luck !