You should clean/disinfect anything the frogs touched. I am presuming you purchased these frogs from a large reptile supply company. Even if you buy captive bred, those places are known for putting amphibians from all over together. Whatever you buy from these companies should be completely separate of any of your long term captives. Also what kind of water did the frogs have. If you used distilled/RO, and the enclosure does not have any minerals, you could be diffusing minerals out of your frog, which is obviously not a good move. I would have some gravel or something similar in the drainage layer to prevent this.