Best chain lube?

Hi there,

Was wondering what is the best chain lube you folks suggest.

I'm a all season rider and I'm trying to understand what is the best for the F850 non endurance chain.

Till now I've tried S100 2.0 and Motul, and I'm basically doing chain cleaning/lubing every week since I'm rinding in a wet and very cold (-5 *C); but I'm not very happy, especially the S100.

Any thoughts?