Chlorhexidine (aka Nolvasan) is a very effective bacteriacide, virucide, and fungicide. 100% safe to use in reptile cages because it leaves no toxic residue or fumes. This is the same stuff veterinarians use to irrigate wounds and is even used as a mouthwash for animals and people.
I personally have been using this product for years and it has my full endorsement.
*Not available for internatinal orders*