Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean a fiberglass shower floor [title] Use a nonabrasive cleaner. [step] If you have a fiberglass shower or tub, it is important that you only use nonabrasive cleaners, as abrasive cleaners can scratch the surface. Try using a dish washing liquid, liquid laundry detergent, all-purpose cleaner, or a soft scrub product.

Ending1: [substeps] Make sure you wear a plastic or glass apron to protect yourself, and do not use soap or enzymes. [title] Let the cleaner sit on the floor for several minutes. Ending2: [substeps] Avoid abrasive cleaners like scouring powder or ammonia. [title] Apply cleaner with a nonabrasive applicator. Ending3: [title] Select a standard fiberglass shower cleaning cleaner. [step] Fiberglass shower floor cleaner is good when it comes to preventing scratches. Ending4: Vinegar is also effective, but only a little more abrasive. [title] Scrub with a square mop or sponge.

Answer format: ending1/ending2/ending3/ending4