No need to panic! Simply wipe up the liquid on the cardboard with a dry cloth without detergent and let the rest air dry. As long as only a small area has become wet (example: 1 spilled glass of water), you do not need to worry about the stability of the cardboard furniture. However, your furniture should never be permanently exposed to moisture, as this can cause it to lose stability. Please check the stability of the furniture after each contact with liquid.