Our GCF Heavy Duty Cleaner is a ready to use. Our GCF Heavy Duty Cleaner is a ready to use, fast-acting, heavy-duty cleaner formulated to clean all washable surfaces. The non-abrasive formula penetrates and removes the most stubborn stains and leaves surfaces sparkling clean. Free of harsh fumes, this product leaves surfaces with as fresh citrus scent. Can also be used a degreaser to remove tough set-in grease and oil stains on any surface!