Our first Wedgle sold in 1996 is still working today! And in our slow season, we look at the units that come back from the field to determine if there is a better way to keep everything working properly. What we have found is that using the garden hose attachment to clean out the injector will take care of most glitches that an applicator might be having with his unit. Chemical residue can plug the check valve and keep it from closing properly. The success of any pumping systems depends on the check valves working so keep your unit clean. For more information, click here.