I've vaped Tasty Vapor's Cafe Machiatto for over two years, exclusively, and love it. Never had anything clog. Not on V4L original ecigs, their Titans, on kGo 1100 mAh, or (by far the best) my Provari. I use Tasty Vapor's "doublers," order the juice in 48mg and cut it to 24 mg with the doubler. Same terrific taste.
In the past two months, discovered four great new (to me) tobacco flavors. Am vaping them more now than the Cafe Machiatto. Have sampled several other coffee flavors during the past couple of months too, but they're all too strong or too sweet for my taste. Cafe Machiatto, for me, is j-u-s-t right.
Good luck!