my local vape shop tells me that the coils on my kanger mt3 should be replaced every 10 to 14 days when they start developing a burnt taste.however here and on you tube I see that they can just be cleaned instead. is my local vape shop just trying to sell me coils more often than I need them? how can I tell when a coil needs to be replaced instead of just cleaned? after smoking cigarettes and pipes for 44 years I started vaping 6 weeks ago and have had no desire to smoke my pipe in that time. this is the first effective tobacco replacement that I have found.my sinuses are clear and my lungs are clearing up I can breath easier and don't get winded as quickly. I am very happy about this. 