Recently been there, done that. If diagnosed with giardia, you do need to wash the water bottle every day, but your baby should have fresh water daily anyway. You will also need to thoroughly clean the cage daily, as the pesky little buggers are present in the poo, and like it or not, our little fuzzbutts are poop eaters. Cleaning the cage will need to include a good scrubbing with bleach water, after which, you will need to rinse THOROUGHLY. If you have wood ledges, the same applies, but it is also a good idea to dry them in the sun if you can, or maybe leave them out altogether until the "infestation" has been resolved. If you are able, letting your cage dry in the sun would be good too. I wasn't able to because his palace is too big to schlep outside, to it took almost forever to dry, which meant that I had a thoroughly ticked chin to take out of the carrier when I finished - not a pretty sight!! You will have to be dilligent, because reinfection is extremely easy. If you are giving medication, it would not be a bad idea - and I know that this sounds really strange/creepy, to wipe the hiney with a damp cloth to remove any unhatched eggs that may be stuck to the area. Hope this helps, I don't evny your situation, because it's a pain in the ***, but the work is definitely worth it.