Loud computer fan

My home workstation was so loud it was crazy. It had been getting gradually louder. I searched for solutions using Google and based on what I read thought maybe a wire was lying on the fan. I took the case off and sure enough there was something on the fan. It was an elastic some cables had been tied with that had "rotted". One free end was dangling onto the very top of the fan... Pretty loud! I blew the dust out, removed the elastic, and secured the cables another way. Seems fine now.