As i'm 90% sure my MAF is playing up i need to get it replaced under its VW warranty, problem is they'll only replace it when its completely screwed and throws up a code. That would be fine under normal circumstances, i'd just drive it until it dies but on this occasion i'm reluctant to do that as the MAF seems to be causing missfires which im not all that comfortable with. Is there a sure fire way to destry one on the sly?