Catchmasterglue boards are pre-scented and are intended for use without additional bait. You can increase their effectiveness by placing glue boards along known or suspected rodent pathways. If you feel the need for additional bait to increase its attractiveness, place a small amount of a non-oily substance on the center of the board. DO NOT USE OIL-BASED FOODS, SUCH AS PEANUT BUTTER, for bait as this will degrade the adhesive and allow rodents to escape.