When it starts getting peanutbuttery, yes. Trust me, you'll know.
Yup, as soon as it starts to change you should spray/swish/scrape/dunk. It's very obvious. It took about 3 months for us since DD2 wasn't really into solids.
share.memebox.com/x/uKhKaZmemebox referal code for 20% off! DD1 "J" born 3/2003 DD2 "G" born 4/2011 DS is here! "H" born 2/2014 m/c#3 1-13-13 @ 9 weeks m/c#2 11-11-12 @ 5w2d I am an extended breastfeeding, cloth diapering, baby wearing, pro marriage equality, birth control lovin', Catholic mama.
I just started when we started solids. We did BLW and we didn't get a consistency change for about 5-6 months, but we got food bits as soon as he started eating.