My little guy, Andrej, is now 21 months old. He has LI, and has been taking two baths a day (one first thing in the morning, one just before bed) since he was at least 6 months old. We usually let him soak for 15 minutes, then I scrub him before he gets out. Sometimes in particularly harsh weather when he seems to dry out more quickly, I will give him a 3rd bath in the middle of the day. He seems to like the tub time and he looks to be comfortable with this routine.
Daughter, Emma born 9/2001 -unaffected
Son, Andrej born 8/2003 - has Lamellar Ichthyosis
Daughter, Tori born 3/2006 - has Lamellar Ichthyosis