Samsung SPF-87H User Manual page 7

Do not use any chemicals such
as benzene, alcohol, thinners,
mosquito repellant, aromatic,
lubricant, detergent or wax.
This refers to locations exposed
to conditions such as heavy
fine dust, chemicals, high or
low temperature, moisture,
or when the product needs to
be used continually without a
break over a long time.
Heavy accumulated dust may
cause electric shock or fire.
Using the product without
verifying that it has not been
damaged may cause electric
shock or fire. Please contact a
service center.