Store with the valve on the lower side of the wheel. Inflate with valve on the lower side of the wheel. If it ever clogs up, just remove the valve core and clean out. Never had that happen. It takes about a year or so to dry up, so it's longer than the tire will probably last. The tires I was using last season still leak sealant when I refill them with air until I sold them. It works on small punctures.