|Your idle temps are too high.|
When you were inside the case doing the cleaning did you move the heat sink? You should probably remove it, clean off all thermal pad/ compound and apply a small amount according to the instructions for your processor type. See the link below for more on that. When blowing out the dirt/dust you should also do the power supply from both ends. The fan/s in the PSU do a major portion of the cooling. Do you have a rear case fan? If so, what is the diameter of it?
Go to control panel> power options. Decide after review which selection there is best for you. Then after ticking the bullet go to “change plan settings” . After adjusting those selections to suit, go to advanced power settings> processor power management. System cooling policy. Set to active.