well there is water vapor in it
Some distributors have a small opening in the bottom with a screen for ventilation but the screen becomes plugged and then condensation builds up.
Possibly lithium grease or condensation
replace the cap, it most likely has a hairline crack or bad seal.
Check for a crack in your distributor cap. Look for condensation inside the cap. WD-40 will displace water if you find it in the cap. That is a starting place.
Check the timing and the distributor cap. If the timing is off, the engine will fire too soon and you'll get fire out the carb. If the distributor cap is faulty you could get the same thing. Make sure inside the distributor cap is dry, absolutely NO moisture/condensation. If that doesn't seem to be the problem, run a compression test on the engine.
Evaporation is the opposite of condensation.
condensation
Condensation is the change of the physical state of matter from gaseous phase into liquid phase and is the reverse of evaporation.
It is known as condensation.
" Condensation " condensation or condensing
There could be condensation in the distributor or possibly a worn camshaft. It is also possible that the carberatuer needs to be cleaned or rebuilt.
Condensation
The water is evaporated creating condensation. TEchnically the clouds are condensation