Hello. I'm in the process of adding a Graphics Card to an older and slightly dusty computer. Is it advisable or even possible to clean out a computer's PCI slot prior to installing the Graphics card? (BTW, I did clean out the case's interior earlier this year...but not an "in depth" cleaning and NOT the PCI slots). Can someone please recommend the do's and don't s of cleaning out a PCI slot. Thank you in advance.