Hi lybrate-user, first of all thankyou for approaching us for your query. I read through your query and I must say that there is nothing much to worry in this. The coating is normal for everyone. In my opinion I prefer you to remove the coating daily at night. This coating can have so much bacteria and fungi which can cause diseases of throat and can cause bad breath
. So better do at night so you can save time of hurry morning rush. Hope I have answrd you query. Do get back to us for more queries. We are eagerly waiting to help you out. Have a nice day. Thank you.