Clearing a QuickForm

I'm using QuickForm in an application at the moment, and I'm trying to find a way of clearing fields that have errors (specifically a pair of password fields for user signups), and also to clear out a form once it's been used, to allow it to be used again for another entry. I've had a rummage around the source, and setValue seems to be what I need, but I'm just wondering if there is anything a little less messy then creating a reference for each variable, and then clearing them one by one. What I'd really like is to be able to go $form->clear() and have the values reset to blanks. Jon