I tend to soak my stuff regardless and plan to continue. I did not soak my last brew, first time ever, and got an infection…also a first. If you soak at least you know you are getting into all the nooks and crannies. Spraying only hits where it lands. Bottom side and inside fittings may not get hit. I fill my largest kettle up and then let gravity feed it into all my other vessels and all my spoons and chillers and everything I put into the kettles. I know the heat will sanitize stuff on the hot end, but I figured what can it hurt to ensure sanitizer goes through the valves etc, usually beer only grows through that after brew and chilled…so anything in there may not be sanitized. Sanitation is key to brewing, I don’t think there is such a thing in over doing it to make sure you don’t have issues. Star San isn’t that expensive. You may go through it faster but still, $2 worth of extra Star San is better than dumping $40-60 worth of beer.