Thanks for the input ET but none of those are the solution.
This is literally the acid reacting with other compounds over time and irrespective of nic % it happens. I've tested from max VG to 66/34 and it happens consistently and it's got nothing to do with how I vape it. At 5W it happens, at 50W it happens. Just a side effect (sometimes good, sometimes bad) of using acids in my experience. Might also be that in this particular mix I use a good deal of it.
This is literally the acid reacting with other compounds over time and irrespective of nic % it happens. I've tested from max VG to 66/34 and it happens consistently and it's got nothing to do with how I vape it. At 5W it happens, at 50W it happens. Just a side effect (sometimes good, sometimes bad) of using acids in my experience. Might also be that in this particular mix I use a good deal of it.