Cleaning HDPE water Jerry cans and No Chill Cubes

[aero-spaced-out]

Hello all,

Just getting ready for a brew and will be my first time treating my tap water.
Went to hunt out my 25L HDPE water containers and came to find that there was condensation on the inside and they were sealed. (No chill cube is fine but it is also HDPE so included it in the title)
They've been like this for at least 3 months now.
There is not growth on the inside of them or anything but would a normal hot water with PBW/Oxy and through shake to agitate be suitable for these to get rid of anything that may have decided it likes the conditions in there?
They held RO water that I used for cleaning at one stage.

What's the best way to go about cleaning these properly and thoroughly?

 

[Caramel Ox]

I have never cleaned the containers I use to fetch and store RO so I’d suggest doing nothing.

 

[Rwilts]

With my no chill cube (used yesterday) I wash out after use ,add a kettle of boiled water and the give them a flush with starsan. Then when I next use it I flush out with boiled water and fill. I have a few dark patches inside but they haven't caused any issues.

I did retire my first cube after about 20 odd brews just because it just looked dirty inside and I had another.

If I use the cubes to collect RO water , which I did a bit in 2023 I just made sure they were clean to the eye.