Can be washed off with dish soap! Then rinse the detergent off the lens naturally under the faucet. First, use a relatively large amount of water, and then use a very slow and very small amount of water. The main purpose is to slowly wash away the small water droplets on the lens. In fact, there are still some If it's a little difficult to rinse, you can use a paper towel to absorb water (just absorb water, don't rub it on)...Do not use your hands...because this will imprint the body oil on your hands again! This is how I wash it off...usually every 4 to 5 days! !