Storing opened bottles of fish sauce, oyster sauce

[GothDetective]

and hoi sin sauce - can I ignore the instructions to keep in fridge and use within 7 days once opened? Never used them before but if I have to chuck them next week it was a bloody expensive recipe.

I've been storing ketchup in the cupboard till it runs out safely for years now and I notice we're now supposed to use that within 6 weeks.

Here oyster sauce/veggie alternative goes in the fridge until it runs out; although I think when living in Thailand we just kept it out (but went through a bottle much quicker)

Fish sauce keeps forever, no fridge needed - probably gets better with age

I didn't use to keep my oyster sauce and fish sauce in the fridge, just in the store cupboard. I did keep my hoisin sauce in the fridge though. Don't know why.
But definitely, they all keep till years on end ...

Thanks, will save some space in the fridge then.

i have zillions of these type of things in the fridge. unless they split/have mould on/taste fizzy we eat them.