I always keep a pack of Techron in the garage, occasionally using it, however my Wife's TSX is getting an occasionally reported misfire on cylinder 1 - injector checks out electrically, and nothing else is amiss. This is the ODB2 system reporting this, the only thing i have also noticed it's a little sluggish pulling through the gears - so i'm thinking the injectors aren't so clean. Anyway, i'm after what people consider the best over the counter cleaner i can get. I understand a regular use of weaker products is recommended, but what i really want, is a strong cleaner you aren't supposed to use that often. BG 44k was suggested, but i'm trying to see what modern day suggestions people have on this subject? Thanks.