The cleaning paste I use for PCBs is called "Jiff" here. It's a gentle abrasive paste used in kitchens & bathrooms. Only apply and rub lightly with a moist paper towel. Don't scrub it! Wash, rinse and dry well after.That's helpful. Those of us new to this soldering business need this type of advice. Is there a preferred cleaning paster that should be used?
Yeah, but the instructions say that extra flux shouldn't be needed and might result in an adverse result. For those of us that aren't soldering experts we don't know when to break away from the instructions and do something different. Curious, why is there residual grease on the PCB if it has been cleaned per the first paragraph?
This I already do...
If you are new to soldering, then follow Cris' instructions - period! However, as I've been involved in electronics and soldering for 45 years, I can make up my own rules! There is always the possibility that you might touch the PCB pads after the cleaning, so there might be some residual grease from that. Also, if you didn't wash the board sufficiently and left some contaminants on the pads, the boiling flux helps to remove this.