You might want to use the method I devised to add water in my homemade incubator.
Just take a piece of 1/4 inch tubing (about 3 feet worth) like you would use in an aquarium; run through a hole in the wall of the incubator placing one end into your humidity tray or container; attach the other end of the tubing to a squeeze bottle (I use a mustard dispenser) by pushing the tube onto the spout and taping with electrical tape for security.
To put water into the incubator tray just squeeze water from the bottle through this tube.
I use this hook up all during my incubation period and never have to open the incubator unless I want to candle the eggs (I don't). I use an automatic turner.
Just take a piece of 1/4 inch tubing (about 3 feet worth) like you would use in an aquarium; run through a hole in the wall of the incubator placing one end into your humidity tray or container; attach the other end of the tubing to a squeeze bottle (I use a mustard dispenser) by pushing the tube onto the spout and taping with electrical tape for security.
To put water into the incubator tray just squeeze water from the bottle through this tube.
I use this hook up all during my incubation period and never have to open the incubator unless I want to candle the eggs (I don't). I use an automatic turner.