go buy 6 new o rings for the lower part of the injectors, pull the rail again. with a razor cut the old ones off, then oil the new o ring and roll it on.

get some brake cleaner and 50 Q tips. spray some brake cleaner in the cap so you have a puddle of it, dip the q tips in the cleaner and then clean out the injector holes.

now re oil or use Vaseline to re lube the o rings and slide them back in the holes.