Hi, vaape. When I first started vaping a buddy gave me a box of juice a friend of his had given him when he closed his vape shop.
Some of the juice, dekang and other chinese juices weren't very good. But in the bunch were some bottles from MFS from when they first started dealing.
It was well over 4 years old but still good. It depends on where the juice was stashed, how much heat it was exposed to, ETC.
Surprisingly some of the Chinese juice, the menthol, not that I like menthol,was still good also.
It used to be that they didn't put expiration dates on cans and other food stuff.
We tend to buy our canned goods in quantity in case of hurricanes and other acts of nature and mankind, so sometimes we end up eating items 6 months to a year past the expiration date.
Six month old juice, I wouldn't worry about. Sometimes I let juice steep that long.
The worse that could happen is that some of the nicotine has evaporated. If you can taste cherry, and you should be able to, you're good to go.