My procedure is to thoroughly rinse out a keg AS SOON AS IT KICKS with hot water, add some near boiling water to the keg and pump through the faucet to dissolve the stickiness, then run Star San through the faucet. A few times a year I run BLC through the lines/faucets. I have enough spare kegs that I haven't made a BLC pump bottle - I just put some BLC in a keg and pump through the faucet.