Yeah, my mom's computer is like 8 years old, she keeps it on the floor, and we have (had) a long haired cat that would shed A LOT and I opened up the case to clean it out because I could see the dust and animal hair clogging up and sticking out of the front intake!
I opened that thing up and it was one of the most terrible sights I've ever seen! Before I could even use the compressed air, I had to physically pull out the globs of hair and dust from the fans, corners of the case, heatsinks, and components!!!!
