I been doing ok on the diy front, all flavours taste as they should.. .. but I bought a Toffee flavour concentrate and it has a funny funky sort of taste to it, almost like a gone off sort of taste is quite weird and hard to explain. Are some toffee's like this until they've steeped a while or what do you think is going on, the other flavours I bought from the same place all tasted good mixed and vaped straight away at 5-10%, I did the test batch with the toffee at 5%
Thanks

Thanks