I have used Break Free and Birchwood Casey products for years, and they have worked great. I have been in the gun industry for 14 year and in my experience non-gun cleaning chemicals are usually the cause of most guns malfunctions. Brake cleaner and WD-40 are designed for cars and other products, not guns. Gun cleaning products are specially formulated synthetic oils that won't lose viscosity, dry out or stiffen up in extreme environments - such as cold, heat, dust, dirt, humidity and even salt air - keeping equipment in ready condition for months at a time. Also using non-gun cleaning chemicals can void the warranty.