Clean Beer Glass

The video, made by brewers MillerCoors gives away an industry secret - how to tell whether your beer glass has been properly cleaned. It clearly explains the difference between clean and "beer clean". Essentially, detergent residues can mess around with the taste of a beer that otherwise has been meticulously brewed, transported and stored in order to protect the flavour. The secret to telling if detergent, oil or other residues are on the glass is by looking for bubbles that cling to the side, or the foam head goes down rapidly. The video also suggests that the way to check is by wetting the glass and shaking some salt into it. If the salt coats the inside of the glass evenly all over, your glass is "beer clean". If not, there are still oily or greasy deposits which will attract more salt.