I do similarly but I use a stronger bleach mixture, more like 10 or 15%. I re-use delicups for feeding babies, so I throw them in a utility tub and fill it up with water then add bleach to the whole thing. Reptile Basics sells a good disinfectant which I have been told works better and faster than bleach, but it's a bit pricey so I stick to what has worked for me in the past.
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King Snakes! Who can make a better mouse trap?
Jorge Sierra

My Site > www.Sierrasnakes.com