Leather made floaters has a soft grain that is best cleaned with a special brush, which you can purchase with a cleaning kit or wash it directly. If your floaters have a care label, use whatever the manufacturer suggests.
Use the leather cleaning brush to lightly brush away dust or dirt that has accumulated on your floaters. Don't go back and forth and brush repeatedly towards the same direction. Once you get off this layer of grime, your floaters will already look newer.
Scuffs and marks on the floaters that won't brush out can often be removed by rubbing with a pencil eraser or a piece of crepe rubber.
Once they are clean, you can even polish your your floaters. This will assist in preventing further stains and marks & follow the manufacturer's directions.