One quick thing before dumping old dishwasher

[Humbaba]

Put the household's Crocs through on a quick cycle. After taking them out and while still damp, rub immediately with paper towels to remove last of the gunk.
You're welcome.
Won't work if the old one is knackered, admittedly.

Excellent tip @Humbaba . Can I add, in time-honoured Mumsnet tradition, the lid of the bin?

Also, just bumping this thread for you because there must be tons more grotty things you can dishwash before dumping the dishwasher.

Toilet brushes surely? runs away cackling

Isn't this the ideal time to try cooking a lobster?