Tea tree oil has excellent anti-parasitic, anti-bacterial and anti-fungal properties. A good quality oil, with the most beneficial properties, contains more than 35% Terpinen 4-ol, less than 10% Cineole and is from the "Melaleuca alternifolia" species. You can mix several drops in water and use a cloth to wipe down hard surfaces, rinse or wipe them with clean water afterwards, like you would after cleaning with a bleach solution. I use it to clean and disinfect Blinks (my beardie)
bath basin, "stone" hide and to spot clean his terrarium. If you want to make a disinfectant spray cleaner (instead of using bleach or other chemicals), mix 2 cups of water, 1 tablespoon of liquid dish soap and 20 to 30 drops of tea tree oil in a spray bottle. Also, you can use it in the laundry to clean his towels, blankets etc. You'll have to google a recipe for laundry though, I don't have one :/