I use a long handle pair of needle nose pliers with angled end, and I grab the side if the hose where it touches the injector, and pinch it off. this cleanly removes the old hose from the nipples, and is easier than pulling it off, then digging for the little bits that remain.
I then use the needle nose to push the new hose on.
I like to use a section of 1/8" weed eater fuel hose so I can see bubbles from the injectors to see if there is a leaker generating air...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!