AIBU to be getting seriously annoyed and wound up about this. MIL is absolutely awful at washing up, she doesn’t think it’s important to use hot soapy water, she doesn’t rinse anything after she’s washed it, she will put things in the dishwasher that shouldn’t go in there. At first I would politely say you don’t have to do that when she starts washing up, but she’d insist. I’ve now got to the point where I’ve asked DH to ask her to stop doing it and gently point out that we have to rewash everything after she’s left so it doesn’t actually help us. She just laughed and said we’re too fussy about it and it doesn’t matter if things are not washed to our perfect standards. I know she wants to be helpful but it’s the opposite, it really stresses me out. Otherwise she’s lovely and we love having her over but when she was staying with us over Christmas I have found it so annoying! Should I just let it go? Let her do it even though I know we’ll only have to do it all again. DH agrees she is terrible at it but he’s also at a loss as to how to stop her.