Casio G-Shock GSW-H1000 User Manual page 109

After using the watch where it is submerged in either seawater or fresh
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water, or where it is soiled by sand or mud, rinse it with clean water as
described below and then thoroughly dry it.
1. Fill a bucket or other container with tap water or other clean water.
2. Place the watch into the water.
3. Gently move the watch back and forth in the water to remove any salt,
dirt, mud, sand, etc.
Should the touch screen become dirty, rinse it off with fresh water. If
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soiling remains, wipe it off with a soft cloth.
Should the charger terminal become dirty, rinse it off with fresh water. If
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soiling remains, wipe it off with the tip of a thin cotton swab, etc.
After washing the watch, use a clean, dry, soft cloth to wipe away any
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remaining water. Next, leave the watch in a well-ventilated, shaded
location to dry thoroughly.
To clean dirt from the surface of the sensor in the center of the back cover,
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wipe it with a soft cloth, taking care not to damage the surface.
To maintain water resistance, have the gaskets of your watch replaced
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periodically (about once every two or three years). Should gasket
replacement become necessary, be sure to request it from a CASIO Service
Center or your original retailer.
Be sure to leave battery replacement up to an authorized CASIO Service
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Center or your original retailer. Unauthorized battery replacement may
cause problems with the waterproof performance of the watch.
The inside surface of the watch glass may fog when the watch is exposed
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to a sudden drop in temperature. No problem is indicated if the fogging
clears up relatively quickly. Sudden and extreme temperature changes
(such as coming into an air conditioned room in the summer and standing
close to an air conditioner outlet, or leaving a heated room in the winter and
allowing your watch to come into contact with snow) can cause it to take
longer for glass fogging to clear up. If glass fogging does not clear up or if
you notice moisture inside of the glass, immediately stop using your watch
and take it to an authorized CASIO Service Center or to your original retailer.
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