"New Pc smell" now for over half a year. What can i do?

Hello, i have a new PC since June 25 and it still has this" new PC" smell when the pc is on. Its getting better but its still strongly noticable. That cant be right, can it? Any idea what i can do about it? I have build it together with a friend who hast build many pcs already and we both cant figuring out any Hardware Problems. The temperature is always normal.

Sorry for my bad english its not my first language.

Thanks for helpdesk im advance.