Make sure to wipe any liquids on the inside of your  refrigerator and verify over the next few days if this reoccurs. This may be caused by condensations like placing warm food items in a cold refrigerator. The shelves and storage compartments of your refrigerator must be keps dry of liquids at all times. If the issue persists please be with your product and contact Hisense Customer Support on 800 447 367. Hours of operation are Monday to Friday 8:30am to 7:30pm AEST and weekends from 9am to 5pm AEST.