One way to get a quick measure of possible dry down effect is to squeegee the water off the surface of the print. When the print is wet it reflects light differently than when the surface is dry and this can really help me if I need a quick look at possible dry down. I find hair drying slow and a waste of power, but when in doubt fully drying the print is the best way to go. I find the microwave can really effect the paper gloss, making the paper very glossy and thus throws off the dry down for me (on glossy all I use for fb). Hair drying seems to do the same thing to a lesser degree.
Sometimes you can also look at a print at a stronger angle and it will also help show how the print may look when dry. I dont know why but some technical person on here can probably explain it.