Did your customer have any specific concerns he wanted you to address, arising from some issues he has from cleaning, or does he just think his products could look cleaner? You say you are using Ensolv but didn't say how you are using it. Your mention of vapour cleaning suggests by hand/topical sprays. For sure you can improve your cleaning if you are applying by hand/spray cans. I am not a great fan of solvent cleaning as generally it was never that effective and now that compliance issues narrow material choices for formulators, the difference between solvents and aqueous/semi-aqueous cleaning can be quite marked. Vapour degreasers do help ensure a consistent process and help get the best from the cleaning material, but they do not change the basic efficacies. I am not sure how vapour cleaning can degrade RF components. Perhaps certain types are effected by the increased process temperatures compared to hand cleaning which perhaps you are doing now? Regards Mike Fenner Bonding Services & Products M: +44 [0] 7810 526 317 T: +44 [0] 1865 522 663 E: [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask] Sent: Saturday, June 02, 2012 12:49 AM To: [log in to unmask] Subject: [TN] Cleaning PCB Assemblies Hi Folks!! Could use some help. We are a contract mfg. using no-clean solder paste and roll solder for secondary ops and touch-up. Some of the PCB assemblies contain RF components and we have had a customer voice some concerns regarding our cleaning (using EnSolv). Have heard that new chemistries with a aqueous washing system have been successful. Have also heard a vapor degreaser works well but not the greatest choice with RF components. Would appreciate being pointed in the right direction. Thanks in advance for your help!!!!! Regards, Bill ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________