Graco Smart Seat Owner's Manual page 62

Buckle Cleaning Process:
WARNING
Prevent serious injury or death:
objects or debris that could prevent latching.
1. Turn restraint over, push retainer through crotch strap slot (a).
2. To clean buckle - place in a cup of warm water and gently agitate
the buckle, press the red button several times while in the water (b).
DO NOT SUBMERGE THE HARNESS WEBBING. DO NOT USE SOAPS
or LUBRICANTS. DO NOT use household detergents. Never lubricate
buckle.
3. Shake out excess water and allow to air dry, harness webbing
should be dry before use (c).
4. Repeat Step 2 and 3 as needed. Buckle should fasten with a "click".
5. Re-attach buckle into the same slot from Step 1.
Re-check harness for correct installation before use.
Bottom of
child restraint
62