Alright. At the top of hith head uthed to be hornth, right? All you have to do ith thcratch him kind of like a cat right at the top where the bathe of hith hornth would be. If you don't know where that ith, thcratch all around on the top of hith head.

[Sollux doesn't know about how Karkat's back to being a troll just yet. (Because I'm assuming this thread is taking place before he stumbled into Karkat.)]