We tried an experiment once where we put in a "stagnant" rinse, (this in parentheses, because I feel that the term is an oxy-moron, ie, it is either stagnant, or a rinse, it cannot be both). We put a few ppm of a fluocarbon surfactant into the rinse, and PING!, instant good rinsing. This is a bit extreme, but, at the end of the day, it may be what is required. Rudy Sedlak RD Chemical Company ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################