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Adjust only iff the inside edge of the tire is hotter than the outside edge by more than 10 degrees.
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
Having the inside edge too hot generally means the setup is not allowing for the outside patch of the tire to come into contact with the track as much as it should. To resolve this, decreasing the negative tire camber (value closer to 0) will move the load more towards the outside edge of the tire. Changing camber will impact cornering performance of the car.
If the front tires are scrubbing too much down the straight it could mean that the front tire toe-out is set too aggressive, try reducing it to prevent the tire from scrubbing along the surface too much. Reducing the front toe-out will impact the cornering performance particularly during turn in.
By decreasing the tire pressures slightly you will bring more of the tire into contact and help spread the load and therefore temperature across the tire.
If the overheating of the inside edge of the tire is happening mostly during cornering, softening the anti-roll bar stiffness will allow the car to roll more of its weight to the outside and with it also spread more of that weight onto the outside edge of the tire. Changing the suspension stiffness will have a big impact on the cornering performance however.