I live in Central Qld so it is moderately hot most of the time. The car is garaged but it was left in the hot sun for 5 hours on one occasion and the left hand side of the dash went sticky and after that, it just kept spreading so now the whole dash is sticky. Nothing I or professional car detailers have tried, including really strong solvent will remove the stickiness. Citroen does not return my calls. Any ideas? On a C5 2001 or any other vehicle for that matter. I am desperate. Thanks.