Honda 2003 ST1300lA Owner's Manual page 138

Appearance Care
Refer to Safety Precautions on page 72
Using plenty of water, clean the windshield with a soft cloth or sponge. (Avoid
using detergents or any kind of chemical cleaner on the windshield.) Dry with a
soft. clean cloth.
To avoid possible scratching or other damage, use only water and a soft cloth
or sponge to clean the windshield.
For a dirtier windshield, use a diluted neutral detergent with a sponge and plenty
of water. Make sure to wash off all the detergent. (Detergent residue may cause
windshield cracks.)
Replace the windshield if scratches cannot be removed and they obstruct clear
vision.
Take care to keep battery electrolyte, brake fluid, or other chemical solvents off
the windshield. They will damage the plastic.
136
Servicing Your Honda