Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to clean tires and rims [title] Spray a synthetic wheel cleaner onto dry tires and allow five minutes to set in and lift off grime. [title] Rinse off cleaner with a hose, being sure to remove all traces of the cleaner. [title] Examine the tires.

Ending1: [step] They should be smooth and free of dirt, debris, and oil stains. Give your tires a thorough washing and install new ones if necessary. Ending2: [step] If they are new or modified, they may be of poor quality or with imperfections of some sort. Have a friend help you properly inspect the rims of the tire. Ending3: [step] You may find that mud or mold is accumulating under the wheels, so remove this dirt and mud before you can clean the rims. Try scrubbing dirt under the wheels often as well. Ending4: [step] If they are still not up to expectations, allow surface to dry and then repeat steps 1 and 2. [title] Apply tire wetting formula to the walls of the tire.

Answer format: ending1/ending2/ending3/ending4