R1 and R1-S razors are used for wet shaving and are good razors for sensitive skin.
X1 razors are used for wet shaving.
Replace the Gillette cartridge as regularly as you feel is necessary, click here for more guidance on changing your blades. New blade cartridges can be bought online, or in all major supermarkets and chemists. After wet shaving, the razor should be rinsed in water. The razor can be cleaned occasionally with soap in warm water.