Well first wash out your beer can (unless your deer like beer). Then just tap the sheetrock screw into the bottom rim of the can with a gentel but firm hand at about a 30 to 45 degree angle. Once the screw atays in by itself tighten untill the flow is as slow as possible. DO NOT SCREW ALL THE WAY IN. Just get to the initial curve of the tip of the screw so that it acts as a pressure seal that can be adjusted to increase or decrease flow. It should drip sloooooooowly mine does about four drops per min. Test with water.