plates are hot - so it looks like a partial blockage in the water circuit
somewhere - that would fit with the more heavily soiled stuff not getting
clean and the nooks and crannies ( bowls) not getting clean.

Ive rung up a couple of the 'little men' who fix stuff and the ones i have
confidence in dont do dishwashers (both said they can get the parts).
There are a couple of others that do DWs but on past experience Im not
keen

How do i have a look and see if the pump is blocked (Bosch SGS5342)