No you shouldn't have to lube a PC fan. Cleaning it out helps but you best bet is getting an after market fan. I've never even heard of ever cool so I'm guessing it's unknow brand for a reason. That reason being they probably don't make good lasting products. Look for a cooler master 212 Evo. It's relatively cheap and works like a charm. If you ever wanna replace the fan on your current or future cooler then go for nauctua or be quiet! those are good reliable brands. Best of luck!