For long bouts, I tried using products with salicylic acid to clear pores, as well as benzoyl peroxide (Paula's Choice, plus her Vit C serum). I used these for months at a time, but honestly, could not tell the difference between the "before" and "after."
Same goes for home SA and GA peels, which managed to burn my skin without unclogging. Two years ago, I treated myself to my first (and so far only) facial. It felt lovely, and while my skin look slightly better immediately after, it returned to its regular appearance within a few days. Months later, I read about the difference between blackheads and sebaceous filaments, which look like tiny blackheads on your nose, but are actually filaments that return within a week of being extracted. In other words, you can't get rid of them, and their appearance and visibility are determined genetically.
From what I've read and been told by doctors, the only products that make a visible difference are prescription retinoids (Retin-A, Tazorac, etc), which require daily use over the long haul.
But I still hope that there are cheaper and efficient options out there.