The simple green is the key. Then dry IN THE SUN for extra soft. Liberally apply TAG while drying in the sun between heats.
Then use a little silicone spray from Napa. Should be in a Red and black CRC spray can. About the same shape as a can of brake clean only shorter.
I think buggy grip and kerosene/diesel eat the rubber up too much shortening the life of the tire.
AKAs work fine on there own we just don't want them to pack up before the race gets moving.
Works good on the chassis as a dry lube to. Our little secret.