My family is planning a trip to Moab Utah. I checked the weather forecast and it's going to be in the upper 80's and lower 90's. So I pulled out the old hydration pack. I try to clean and dry this the best I can after every use, but apparently I didn't do a good enough job last time. While the bladder was fine, the tubing had just a hint of something foreign (I'm not sure what, but it wasn't supposed to be in there). So I took a trip to the craft store and purchased a clearance package of pipe cleaners ($.49 normally $.99) and a 1/4 inch wooden dowel ($.49). Brilliant idea, I know, since the cleaning kit for these things is about $15-$20. The rest is pretty self explanatory, but if you can't figure it out, watch the youtube video I've attached.
For disinfecting I've read that you can use bleach (yucky taste), mouth wash (which can leave a little minty flavor), or vodka or other high proof alcohol.
To help make your water not taste like bad plastic, I suggest putting a tiny bit of gatorade or lemon juice in the bladder. You need just enough to take the taste away- I'd say maybe 1-3 tablespoons depending on the size of your bladder.
Thanks for watching. Happy climbing, or hiking, or biking or whatever you do with your hydration pack.