Back near my parents house, we had a local car washer that only did the underside of your car. Made sense cuz in NY they salt the roads a lot and that’s a huge pain to clean. Other than that, probably 3x over the winter I washed it using a bucket and sponge. It gets cold here so it’s not something I’m eager to do, but I try to keep it free from excess dirt and rubble
Back near my parents house, we had a local car washer that only did the underside of your car. Made sense cuz in NY they salt the roads a lot and that’s a huge pain to clean. Other than that, probably 3x over the winter I washed it using a bucket and sponge. It gets cold here so it’s not something I’m eager to do, but I try to keep it free from excess dirt and rubble