A good all-purpose liquid cleaner should be able to handle a variety of chores but may not be really useful for all purposes. Most, for example, lack the special qualities required to clean windows and ovens or remove mildew. But all-purpose cleaners are versatile enough for mopping, washing, and spot-cleaning hard surfaces such as walls, floors, appliances, kitchen cabinets, and countertops. All purpose cleaners are often the type of product needed when water won’t do.
I don’t know about you, but I always used liquid all-purpose cleaner for it has stronger formulations and do better overall spot cleaning than spray cleaners. The top liquid all-purpose cleaners often contain oil, (dunno the exact name of this kind of oil), and according to Michael V., a singer, actor and a product endorser in my country, this oil is an effective ingredient for cleaning, plus the scent added to the ingredients make the impression of cleanliness.