The pressure cooker is made of aluminium.
In the manual it says to clean it with vinegar... that's it.. no more information on how to clean it other than that.
What I've tried is drenching a scrubbing thing in vinegar and scrubbing in the pressure cooker (PC) but didn't work then I poured half the bottle of vinegar into the pressure cooker and filled it with hot water to cover the discolored part of pressure cooker (about 3 inches or less).. Waited an hour because it was too hot to put hand in.. then I scrubbed again but without any effect.
This is what the PC looks like:
I am not sure if the spots are calcium deposits or pitting either.
That's main reason I want to clean the PC so no explosion happens.. if it's pitting.
Any advice on how I can clean it?
Or if you know if that's pitting or not?
If it's not pitting is it ok to use the PC even though it looks like that?
The PC became like that because I left water in the PC for I don't know how many days, possibly a week... maybe even slightly longer than that.
But I never used the PC so far, never heated it.