Need help with Sony Vaio VPCSA45GX temps solution...

So, I won't give up on my latpop still its 3 years old and for now performing great, all except temps....

So for the last two days i was playing with it, and finally managed to open it and do a thermal paste change. Way back someone told me that only CPU is in direct contact with Thermal Paste but it looks like CPU and GPU both are covered with Thermal Paste.

So I had small amount of Cooler Master TP from my 212+evo PC CPU fan and i used it, after i cleaned previous paste. But one thing bothered me. Around copper headsink, there's black like paper around headsink, its nost sticky, no nothing, just standing there, so i decided not to touch it.

After a while, I managed to do everything and i assembled it. But when I turned on, temps were exactly the same or maybe even worse.

Idling around 55C and reaching 71C on 60% of processor usage (limited under battery options). One more interesting thing is that there's temperature spike. For example its 35c then it goes up to 50, then goes back to 43, and slowly stabilizes itself at around 50-55c idling on desktop with 750mhz cpu speed. Simple video reproduction boost temps to 65c, chrome and other stuff too, around 65-70.

I checked on the internet and I saw couple of people were bragging how their laptop temps dropped to 30c idle after thermal paste change + heatsink cleaning.

So, what I am doing wrong? I was never using my laptop for gaming, its just Chrome, Microsoft Word and Skype... and I'm keeping it mostly on my work desk.

Any help would be appreciated.