Make sure you use *fresh* bleach.
The sanitizing properties of bleach have a shorter shelf life than most probably realize.
I took a few home brewing courses a couple years ago and the importance of using new bleach for sanitizing was stressed multiple times.
There are products that sanitize better, some are 'no rinse' most have longer shelf lives.. Clorox works fine though.
I have a few 55 gallon drums of long term water storage and use Calcium Hypochlorite to sanitize that supply. I use the 'no-rinse' home brewer sanitizing options for my camper though. If it works for Molson Coors, I'm running with that option.
This is what I use in the camper...
Star San PBW