See also:

Adjustable level of each volume
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Cleaning aluminum wheels
- Promptly wipe the aluminum wheels clean of any kind of grime or agent. If dirt is left on too long, it may be difficult to clean off. - Do not use soap containing grit to clean the wheels. ...

Seat fabric
Remove loose dirt, dust or debris with a vacuum cleaner. If the dirt is caked on the fabric or hard to remove with a vacuum cleaner, use a soft brush then vacuum it. Wipe the fabric surface wit ...