If you are doing this in the US, you are sterilizing. ;-)
Oops, no, just disinfecting.

As for the suggestion of cooking pots at 300F, it's a thought,

I sterilize terra cotta orchid pots in the self-cleaning oven, but I would not
do this with glazed pots.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)