Laptop was never exposed to any dirt or food.
I identified the problem. Problem is indeed in battery. I have this laptop close to 10 months now. And I can confirm that the battery is close to swollen state. Here are pictures of battery for better visualization.
If you look closely the first cell looks fine. Then other looks like there is air stuck inside and feels like a bubble.
Here is picture from other side.:
And its this part that is located exactly under touchpad. So when the battery is cool looks like now on pictures. I can imagine that when it heats up in laptop the "bubble" expands and becomes hard. So thats why when laptop is in cool state the touchpad works just fine, then when underload the heat goes up and so does the battery and the "bubble" pushes up on touch pad. It's only matter of time when the battery will permanently swell so I took it out before it can really damage any other hardware inside if comes to permanent swelling.
So it looks like I will have to get new replacement battery which will cost me ~100$. I know that razer gives 1y warranty on laptops so this could be replaced without any extra cost. But I got this laptop from a friend who knows a a friend and so on, so there was no receipt or warranty or what so ever. Probably directly from warehouse with no other retailers for much cheaper. But I'm not the only one with this exact problem. I've seen many people complaing on other forums. Even if purchased in retail store with warranty this could occur past year one. Expected more from a company like razer. If you are paying close to 2k$ or even above you should get better quality parts. So if you get similar symptoms on your laptop, don't hesitate to contact retailer for warranty repair ( if it still under warranty ). If out of warranty, just open it up take battery out and take a good look at it, if you''re comfortable in doing this yourself. If not contact any repair shops that will do that for you. I've seen many laptops (even apple) which have swollen battery and whole touchpad is bumped out because of this. So if it comes to permanent it could damage other internal parts.