Liquid foundation and foundation brush
Liquid foundation is one of the ficklest products to apply. Ever. Not only is its basic application a chore, but even after you feel like you have a routine down, the smallest hiccup — anything from product buildup on your brush to a stray brush stroke — can throw off your entire look for the rest of the day.
These years (literally, it has been that long) of trying different methods, brushes, foundations, etc..I find using foundation brush is a right choice.