•Once a week in summer,and 3 days in winter. No sun dried or heated drying. It is recommended to be placed in propped up when not in use. •Because it is a natural material, there will be a unique diatomite smell, but will slowly fades, do not worry. USE REMINDERS •To prevent malfunctions and damage, do not use it for other purposes. •Because of the material properties, surface defects and a small a mount of powder will appear, this is a natural phenomenon, not a quality problem. •To prevent the board from damage ,please do not process it. •In order to prevent aging damage, do not soak in water for a long time or watering it. •Please air-dry it after a few uses. But do not use dried or heated drying, otherwise it will cause bending or breakage. •After use, please keep completely dry and put upright. •To prevent jams, do not use cleaning agents containing surfactant. •If suction power declines, scrape off a thin layer on the surface with sandpaper,suction power can be restored.
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