starsan is an acid sanitizer which is no wipe or rinse. When i use a sprayer i have maybe 5 ml starsan/.5 l water or maybe a bit more. Its a very strong solution, muich stronger than it needs to be to work but it does the trick. You should spray everything, let it sit, spray again and then dump out the excess starsan and fill your bucket with wort. Dont wipe or rinse it off because it defeats the whole purpose. Its foodsafe so it wont hurt you unless its concentration is in excess of 300PPM ~ 1 oz per 5 gal
On Hiatus: Brewing at work....