Hi Miramax,

As your car is still under warranty you should insist that Tan Chong rectify the problem to your satisfaction including replacing the entire air-con if necessary. As the aluminium oxide is a health hazard I'm sure there are health and safety govt depts you can complain to if they are reluctant.

In the meantime better stop driving your car until the problem is fixed. Your health is more important than saving money on alternative transport.