Check engine light

Anyone know how to reset the check engine light thing on a 2000 cabrio? The car has been at VW numerous times because this light keeps going on and off but it seems all they do it reset it. It's a lease so i waste miles driving back and forth..i'd rather just do it myself. VW is useless and i will NEVER buy/lease anything from them again.

I like the black tape method.

Find out why its coming on and fix it.

my girlfriend has a 99 cabrio and it used to come on in it too, all i did to it was change to spark plugs and she used a higher grade of gas. the light hasn't come on since.