I agree with Divina
If tea tree is suppressing the warts then it is bad in itself. Also since tea tree is camphoraceous, it might antidote homoeopathic rememdies.

Ref para 190 Organon
"All genuine medical treatment of a malady that has arisen on exernal parts of the body(and that involves little or no damage from the outside) must therefore be directed towards the whole, towards the annihilation and cure of the general suffering by means of internal remedies. Only in this way will the treatment be expedient, sure, helpful and thorough"