It would seem that "what we have here, is a failure to communicate".
I'm afraid I did my part by being a bit facetious about pulling the injector. The issue is that "cleaned all the injectors" or "seem to see moisture/gas on the 6 plug" can mean different things to different people, always the fundamental problem with remote diagnosis.
I would suggest that perhaps working thru the basics (air, gas, spark) would put us all on the same page.
Let us assume that the cyl. is getting air. That leaves gas and spark.
Let's start with spark. Pull all the plugs, marking the current #6
plug. Plug #6
plug into #6
wire. While holding (with plastic handle pliers) the plug electrode to the block, spin the engine a bit. No spark? Try another plug, then another wire to identify the problelm source..
No matter what you find, go to the second step below.
Next (with all plugs still out), put a clean, short hose to the #6
plug hole and spin the engine a bit with your nose close to the hose. Smell gas? To calibrate your nose, do the same on another cyl.
It's not rocket science; it has to be one or/and the other.
Let us know what you find out.