There is a visible mark on my wall or furnitureUpdated a year ago

The oily vapours (which carry the FELIWAY "messages") rise above the diffuser in a column of warm air. If this air column is blocked (e.g. under a shelf, table or furniture), the oil may recondense, leaving a visible stain.

Do NOT connect the diffuser under any furniture or object that protrudes from the wall (minimum clearance above the diffuser needs to be 1.20m).