It's vital to the longevity of the item to clean suede just after it stains or before wear and tears damage the textile:
Treat any suede item with a water repellent product. Avoiding water all the time simply isn't possible, but protecting your suede will help. Reapply according to the directions
Whether it's furniture or a suede item of dress-like shoes, it needs to be brushed. This will remove dirt and dust that can damage the textile. You'll need a suede brush that's half wire and half pig bristle, which is the best for getting out the dirt and crud
Suede apparel should be brushed every time it's worn. Suede furniture should be brushed once a week. If this isn't possible, though, go once every two weeks.