Asus EeePC 1005 Heating Problems

I post in the netbooks games blog more and more rarely and that’s because the overheating problems of my Netbook Asus eeepc 1005 HA. After a few crashes powers down and refuses to open even after a few minutes ( while is heated).At start I just unplugged it from electricity  and with the battery had a protection against the overheating problem.Afterwards the Heating problems appeared even with the battery modus. I even opened the case to clean the fan but the overheating problems persisted.  Not only persisted but with the time goes worse. I `m thinking seriously to buy a new netbook  , but I would like to keep my asus netbook .Any suggestions?