I've been head shaving for 13 years now, but just got into wet shaving. I shave my face and head every other day, usually at night. Hot towel, 2 passes with the grain, and about 3 seconds of touch up. I usually get a BBS every time. in fact, I tend to get a BBS on my head and a DFS on my face. I use the same razor and soap for both, aftershave, then shea butter cream on head and face to finish it all off
I have been shaving my head every other day for 17 years. I have this down to an efficient science. I shave my head in the shower using a pivoting head disposable and regular shower soap. I go strictly by feel and it takes 5 minutes. The Personna Twin Blade Plus is the best for this. The Dorco Comfort Thin 2 is ok too.