Putting new injectors on the rails, What's the trick here? Options

[DC_neun_vierzehn]

I cannot seem to get the hose from the injector all the way up the rail. The old injectors I removed were flush at the top of the T. I tried saliva as a lubricant, but that didn't help. I tried twisting them up all the way. No dice. I tried wiggling them (twisting a little in each direction). No dice.

There must be a trick to this. I putting a lot of muscle into this w/o any kind of real success.

Should I try warming up the rubber a tad with a heat gun?

Thought I'd ask the group here before doing anything potentially stupid. Seems like the angle of the rubber elbow is making this harder than what it would be if the hose were straight.