Bad habit and catches cold quickly

My son is 16months old. He eats well sleeps well play wells... in total is activities are upto the normal. However when it comes to his bad habit he has inclucated a habit of chewing/ sucking a white smooth cloth before he goes to sleep or rather when he is sleepy. He cannot sleep without it. I wash it sterilize it and then give it for him to use. However I see that it is becoming a habit for him and I have to make him stop using it. Pls suggest how do I do it? Also pls let me know whether it is because of it he catches cold quickly and takes long time to get rid of that cold. :(

2014-10-31 02:22:19

Amy