Not that I'm going to eat it or anthing, but I've had some lying around untouched for the last 4 years (opened, but lid screwed on tight) and I was wondering if it goes off / less efficient?
I know it's not that expensive, but why bother if you've already got some!
any ideas?
ta
I know it's not that expensive, but why bother if you've already got some!

any ideas?
ta