Yes Check the water quality rinse after pumice scrubbing. The water rinse may use a soap that isn't being rinsed well or that the product is passing to quickly through the rinses 10-15 ft/min. Check the temperature of the water also colder water dosen't clean as well as hotter. (125 to 145 F) Terry Munson [log in to unmask] CSL Inc. 765-457-8095 ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################