Short description of Registry Smoker 1.2: Registry Smoker is a very easy to use yet effective registry cleaner. Registry Smoker is very accurate at determining which entries are invalid or not by using a special 3 step method to check each entry to ensure that it is indeed invalid. Registry Smoker also allows you to create an ignore list to ignore anything that it might determine as invalid, but you determine isn't invalid. That way it can ignore it forever in future scans.