You should clean up poos as soon as you can, wash the cage bottom or any surfaces poo has touched at least weekly. A mild ammonia solution works well but make sure everything is well ventilated and the cham is out of the room. And don't get bleach anywhere near! It will create lethal gases if they mix. Let it sit for a bit (I like putting the chams outside or giving them a shower during this) and then rinse well and make sure it all dries out before putting the cham back. There are plenty of threads about how to clean a cage during or after a parasite infection. Washing your hands well before and after handling is a big step to preventing cross-contamination or re contamination.
Also, a lot of people talk about reptiles and salmonella, and I honestly think it is a bunch of anti-reptile propaganda. Of course, reptiles can carry and potentially transmit salmonella, but you are more likely to get it from a food source and an animal with it is usually very obviously ill. You don't have to worry about it unless you are very old, very young, have an ill animal or are habitually sticking your pet into your mouth.