I hope this helps some of you, even though it is not the only cause of Tisher's problem IMHO...
You should not have to run any installation laps to bed the tyres down. Installation laps are to test grip and set steering throw based on what you feel the car is doing, and to confirm what the grip level now is.
When applying additive to foam tyres for carpet, rears are usually done for twice the time of fronts. Ideally, using CS High or Speedtech, rears should be done for 20 minutes, and fronts for 10 minutes. Rears should be full width additive, and fronts half width. Apply sparingly with a soft-haired brush. Soaking them just makes them soft and wastes additive.
Remove all the excess additive with a towel, and then rub the tyres until they are 'dry' to the touch. Take care not to spread that additive across the whole front tyre when doing this. Now make a final dry using a piece of he towel that has no additive on it. All this should be complete the heat before you run so the tyres are completely dry and ready to race.
On a club night there often isn't time for that procedure, so try using only two sets of tyres and alternate them from side to side, and heat to heat. After their first application of additive, cut the time the additive sits on them in half, but still make sure they are rubbed dry. Wherever possible, let them sit in that state for a heat before you race.
If you can't let them sit, then rub harder to make them dryer. Drive the first few corners of your installation lap slowly, then do a couple of standing starts to dry off the rears completely. If possible, make the car understeer on a couple of corners to dry off the fronts. Now you are ready to race.
The object of the exercise is to have dry tyres at the start of the race. That will give you the most consistent handling throughout the race. If you start on wet tyres the car will be everywhere, you will lose loads of time, and then during the race the handling will change. That's not a good basis for changing set-ups to gain lap time!
I do see drivers coming from TC put cars down with wet tyres - not good! Also, just because the tyres dry when you race them does not mean they are 'stable' for a whole race. On high-grip tracks, wet tyres will react differently with the additive already on the carpet, and that will again make the handling change through the race. Dry tyres are the key to a good race time. HTH
