These are four cleaning mistakes that can turn a simple job into a much bigger problem. * Regular dish soap in the dishwasher = way too many suds * Cleaning in a small room with no ventilation = fumes can build up fast * Cleaning a hot light bulb = sudden temperature changes can crack the glass * Washing a cold refrigerator shelf with hot water = another temperature-shock risk Most of these only take a few seconds to avoid, but those few seconds can save you from a much bigger mess later.