I always giggle at them, so tiny yet so TOUGH, 
No don't soak him. Two things I do, I get a plastic shallow lid off something like a coffee can, a deli container lid, you know the real shallow tops, like they put on a soda to go, .... and fill it with water, they are so low and shallow the baby can almost walk through it.
Don't have to worry about him drowning in it.
And the ole eyedropper is a treasure at this age. Drip some on his nose and evenually he will start to lick it, then after awhile he will come to it when he sees it.
-----
PHEve/ Eve
Contact PHEve