You have to put lots of water-based lubricant on your penis before you insert it. Oil-based lubricants might break down the material.
After you have used it you should clean it before you store it away. The easiest way is to do it with a wet cloth.
When you rinse the sleeve you must be careful not to let water near the electrical part. Water can damage the mechanical inner layer.
You have to dry it off well and you can apply talc power to keep it soft (otherwise it can become sticky).