Dell Inspiron 1505 Laptop - How to clean it's vents?

a can of compressed air is your best option for cleaning inside the computer. You can buy one at just about any store that sells computer parts for about $5. As for a cooling pad, I have one and they are nice but unless your computer is running so hot that you are noticing negative effects on your computer's performance I wouldn't pay it that much attention. keep your computer's insides clean and they won't overheat.