AIBU 16yo DSD leaving freezer open

[Reluctantstepmumof2]

DSD almost 17 repeatedly leaves the freezer door open, so all food needs chucking out on a regular basis. I'm at my wits end. DH tries to minimise any negative interactions with her so won't bring it up or anything else negative really. I have mentioned it a couple of times (she says sorry but then immediately does it again) but I don't want to push it and be seen as 'evil stepmother' she is sweet but very forgetful, disorganised and messy. I realise times have changed but when I was young my parents would have told me off for things like this which obv isn't ideal but was very effective as I'm a very careful considerate person now! Any advice on how to deal with this type of behaviour? This is just one of many similar examples...

I’m not upset - just can’t really understand why you have a bug up your arse. You aren’t being logical enough to be hurtful - I think you’re a bit insane truth be told.

Have you used her money to replace the defrosted items? Because that seems a logical deterrent to her doing it again.

It's really not worth you getting so worked up. You made a judgemental comment saying how much better your child was, I challenged you, you didn't like it, backtracked, got defensive and here we are. That's it really. Maybe next time just think before you post and you won't have to worry.

"All food needs chucking out on a regular basis"
really?
As there's an issue with the seal on your freezer then how do you know it's always dsd and not someone else who's inadvertently left it open?