I've never used bleach. After each use I rinse out the reservoir and tube with water; add some dish soap, swish it around the reservoir and empty it through the hose; rinse out the reservoir thoroughly and drain it out through the hose. I then dry out the reservoir with a paper towel and then hang it to dry with a fresh paper towel in there to keep it open. The hose needs to be emptied a few times to get out all of the drainage. Every so often I push a special hose brush through the hose to get it nice and clean.

If I remember correctly, when brand new you may notice some plastic taste but it goes away pretty fast.