hello, my baby is of 2yr 3mnths. and he has built a habbit of sucking cloth in his mouth while sleeping. I tried much but he don't leave this habbit. even if I take out at late night he starts sucking pillow cover or blanket, whatever is near. many people suggested to boil his regular used clothes in neem tree leaves. but he will take other cloth. I don't understand, is it a psychological problem or normal..?? kindly help.