Tonight I pulled my "new" 2012 MBP apart & gave it a good clean.
Took the logic board out, heatsink off, brushed & blew out the logic board.
Cleaned the old themal paste & reapplied new paste.
I used the ArctiClean 1 & 2, & Arctic Silver 5.
On the GPU I put a single blob in the centre, & the...