” The answer is, “it depends.” It depends on the product and what you are doing with it.
With a non-disclosing agent, such as a one that is water based or water/emulsifyable, then obviously the best time to use this type of product would be when you want to clean something which has been cleaned already – for example a dirty window! This includes any surface which may have been cleaned before by someone else – kitchen worktops for example after being cooked on! Or even cars after being washed at your local car wash! In those cases there will still be some revealing products left behind from previous users so if these were water based they should not generally leave red stains where they have been used. But I’m not talking about those situations here – I am talking about cleaning up spills in restaurants, kitchens etc.. These incidents can happen very quickly and people react differently depending on their level of experience with these situations. Some people don’t seem to realise just how easy it can be to damage surfaces especially when cleaning things like tables and floors without realising that certain types of cleaners aren’t good enough for delicate surfaces like glass or polished furniture (which is why we recommend using specialist glasses cleaner); whilst other people know exactly what happens but don’t really take much notice because it doesn’t happen too often. However I do think everyone wants to avoid having an expensive piece of equipment ruined due to careless