Trust me , this is hardly a matter of concern. At least water mixed with milk won't kill you. The real problem comes during major festivals like Diwali and Eid when sweets are made. That's when they sell "milk powder" and "milk" which is made up of detergent. Yes, artificial plastic milk , and it tastes just like real milk. That's why I avoid eating Indian sweets during the time of major festivals and stick to things like chocolate cake , eclairs etc, it's hard to mess those up. Think I'm joking? Here