Could it be?

Crew now has his hands in his mouth ALL DAY. I thought at first he had just made a new discovery, and the intrigue would ware off...

I was wrong, it hasn't worn off and he drenches his clothes with his drool.

( I now have to change him on an hourly basis)

Yep I'm thinking it can only be one thing, as much as I hate to say the word, I really think he's started TEETHING aaggghhh!!