I have never had clump problems with this mascara. Ever! I started using this one when it first came out. How many years ago? I swear by this stuff. I won't even try a new brand because I am totally in love with this!
I notice it clumps if u use to much. I use this w/clinique high impact mascara and its great. Oh and I comb my lashes with an old thin mascara brush or the other side of an eyebrow brush; the comb part.