Auto technicians recommend basically two ways to deal with a DME relay. First, you can carry a spare relay in your glove compartment, ready to be installed whenever the unit fails to avoid being stranded on the way home; second, reinforce the solder joints on a good or failed unit. Steve Grosekemper, shop foreman for Dieter's Motor Sports, recommends adding solder to the joints in the relay's circuit board to keep the heat from breaking the connections. Keep in mind that a diode in the primary circuit may also be the cause of a failed relay. This diode can be removed and replaced with a new one found at most electronic auto parts stores.