Assuming you have a full-on faucet-and-shank assembly;
Simply detach the faucet from the shank, disassemble it, and soak in oxyclean free (the kind with no added scents, etc) overnight. Rinse very thoroughly, and sanitize. Yes, a very mild bleach solution would work for this, but a no-rinse sanitizer like starsan or iodophor might be a simpler option.
As for your lines - don't replace them after only a single use!!! Either get one of those kits from an online vendor to attach to your shank and flush out the lines that way, or take a cornie keg (or similar), load it up with some oxyclean solution, and simply push that through your lines with a little CO2... Rinse and sanitize using the same procedure.