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Adjust only if the outside edge of the tire is hotter than the inside edge, or if the outside edge is only slightly cooler thant the inside edge.
Note: after a prolonged slide or a spin out, the load and therefor temperatures across the tire surface will not be the same as after normal driving!
Change only one setting at a time in small increments
From more to less influence
To decrease the temperature of the outside edge of the tire and move it more to the inside, increasing the negative tire camber will alter the position tire so that it will lean more on the inside edge. Altering the camber will impact cornering performance.
If the tear tires outside edge is not cooling off enough on the straights, it could be that the rear tires are scrubbing too much along the straight, to help with this, you can reduce the front toe-in value (value closer to 0). Changing this will impact the turn-in performance of the car.
Lastly you can try an increase the tire pressures slightly to try and help spread the load across a wider surface of the tire.