The depth finder I inherited w/ this boat is made by "President" but it looks just like a Uniden Qt206. The manual recommends placing liquid detergent on the sensor so it does'nt take a couple of days for the proper "wetting" action.<br /><br />I keep forgetting to do this and cannot get any valid readings from the sensor. Is this normal to add the wetting agent? If I do apply the soap, does the sensor start working right away?<br /><br />'94 Wellcraft Eclipse