Opened jar of pesto, been in the fridge for a while.
There are a couple of tiny fluffy spots on the rim of the jar but the pesto in the jar looks fine.
So wipe the rim and use the pesto or bin the lot?.
I realise many wouldn't even consider it but i was raised in a house where it was normal to scrape the mould off the top of homemade jam and cut the mouldy bits off cheddar... both parents now approaching 80....