Panasonic KX-TG6671C Operating Instructions Manual page 46

Useful Information
Liquid damage
Problem
Liquid or other form of moisture has
entered the base unit/handset.
Caution:
R To avoid permanent damage, do not use a microwave oven to speed up the drying process.
46
Cause/solution
R Disconnect the AC adaptor and telephone line cord from the
base unit. Remove the batteries from the handset and leave
to dry for at least 3 days. After the base unit/handset are
completely dry, reconnect the AC adaptor and telephone
line cord. Insert the batteries and charge fully before use. If
the unit does not work properly, contact an authorized
service centre.