reduce diesel spillage

[bricktron]

i have done a couple of rounds of jobs with the fuel lines and banjo bolts now. all good, except that i think i am spilling more fuel over the engine than necessary, especially when priming with the hand pump. i have used springy jaws to pinch the line, a rag to mop up excess, and quickness to close up an exposed nipple, but still my parts end up glistening more than i would like. what tricks might i be missing to do a neater job?