Graco Quattro Tour Sport 1752033 Owner's Manual page 85

INFANT RESTRAINT METAL AND PLASTIC PARTS may be
cleaned by wiping with a mild soap and water solution. DO NOT USE
BLEACH. Use of bleach may weaken plastic parts.
HARNESS STRAPS may be spot cleaned or replaced. DO NOT
IMMERSE THE HARNESS STRAPS IN WATER. Doing so may weaken
the harness straps.
BUCKLE may be cleaned with a damp cloth.
DO NOT LUBRICATE the buckle.
DO NOT USE INFANT RESTRAINT without seat pad.
CONTINUOUS USE OF INFANT RESTRAINT MAY CAUSE
DAMAGE TO VEHICLE SEAT. Use an infant restraint mat, towel
or thin blanket to protect upholstery.
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