Trouble starting an early Civic etc. in damp weather, look at the end of the distributor cap while somebody else is turning the engine over, if you see a sparks tracking down the cap, the insulation has failed and requires a new distributor cap. If you soak the cap in WD40 you should be able to get the car running.
I now reposition the enclosure in the back on the tray, but do not re-fit the screws. I now put two lines of masking tape either side of the shower enclosure, I then carefully wedge the enclosure up off the tray to allow me to apply a line of silicon sealant between the lines of masking tape only along the edges, not at the corners we only want to seal these from the outside (see lower picture for reason).