I have been vaping almost 4 years. For the last year and a half I was happily using the kanger t3s. The coils started lasting only 3 days sometimes less, they had been lasting 1 -2 weeks. Upon recommendation I switched to aspire. Same deal with those coils. So they upgraded to the bvc coil saying they will last 10 days. I am on day two of my first one and it doesn't feel like it will last much longer. I am so frustrated. Any tips on why this is happening would greatly be appreciated. Is there a better same type product?