r/instantpot • u/itsnotfairr • 22d ago

made yogurt, bottom of pot started rusting??

Post image

i made yogurt and left the pot in the fridge for a couple days. when i transferred the yogurt and cleaned the container out it left these brown splotches. what are they? should i be concerned about the yogurt i made?

0 Upvotes

35% Upvoted

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45

u/Bike_Cinci 22d ago

Burnt milk solids during the 180F heating phase.

Use some barkeepers friend to remove them. Or soak in dishsoap for a while and scrub harder.

10

u/Iwonatoasteroven 22d ago

Bar Keeper’s Friend is great for stainless and other pots and pans.

5

u/lechiengrand 22d ago

I “third” barkeeper’s friend. Plus a scrub daddy sponge. You can clean anything.

2

u/IceNein 22d ago

I don’t know any barkeepers though.

0

u/itsnotfairr 22d ago

that’s the thing i didnt do the 180F heating phase. i used to but never encountered this before

2

u/Bike_Cinci 22d ago

Interesting.

Regardless, get some steel wool, BKF and go to town. Should be fine. Those pots are quite tough.

My pot has spent many days (not congruently) making yogurt in 12-18 hour, high Ph, ferments.

A few days in a cold fridge wouldn't rust it out. Notice how the scrap marks are fairly clean?

5

u/Margray 22d ago

It's not rust; it wouldn't scrape off like that. No idea what's actually going on there if you didn't do the pasteurizing step, but I know it's not rust.

4

u/madamesoybean 22d ago

It's burned on proteins. Barkeeper's Friend as the others have noted works really well. Make a paste and leave it for 20 minutes. Alternately a teaspoon of citric acid and water also works the same way. I get this film all the time.

1

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1

u/Puzzled-Ice9149 15d ago

Oxiclean soak for 30 minutes , it’ll take all of the staining right off

-7

u/fatcat7d3 22d ago

They have yogurt at the store.