I've used StarSan acid #5, and it worked OK. Overnight with PBW works very well too. Craftmeister is OK.
BKF is the best in my opinion. And I scored on 4 cases (8 cans each) of the large cans awhile back. Believe it or not, Bed, Bath and Beyond. Cheapest price, ($2 for 21 ounce) and since I bought so much, shipping was free.
And of course a bunch of blue scrubbies