What can I use to get rid of the musty smell in my convertible car?

Crumpled up newspaper, a box or baking soda, fresh coffee grounds, charcoal will all absorb odors.

Hope this helps D.

https://www.carsdirect.com/car-maintenance/how-to-get-rid-of-a-car-mildew-smell s

These tips might help: https://m.carsdirect.com/car-maintenance/how-to-get-rid-of-a-car-mildew-smell

Hi D. I found an article that said "Plugged drains can cause water to leak onto the seats or travel along the headliner and lead to some puzzling problems and disturbing smells. Clearing the sunroof drain can be simple: Use a vacuum cleaner to draw out the debris and/or light air pressure to blow debris free. Resist the temptation to use a clothes hanger to clear the lines, as that risks tearing the tubing. And high-pressure air can dislodge the drain tubes.

Serious odors often have a significant cause that warrants a repair, but spills, trash, and drive-through leftovers can also pollute the cabin air. Routine maintenance and thorough car cleaning can avoid many problems, including unpleasant smells."

Using something like Fabreeze is o.k. for the short term, but it just covers the smell. You want something to kill the smell. Here is a site that might help you out: https://www.carsdirect.com/car-maintenance/how-to-get-rid-of-a-car-mildew-smell Good luck