Using these Kailh Black Linear mechanical key switches is easy. Just remove the old switches from your keyboard and insert these new ones carefully. Make sure they fit snugly. When using, enjoy the smooth typing experience they offer. As for maintenance, keep your keyboard clean. You can use a soft brush to gently remove dust from the switches. Avoid getting them wet as moisture can damage the switches. If you notice any problems, like a switch not working properly, try checking the connection first. These switches are durable, but handle them with care during installation to avoid any breakage.