there is a trick to removing them .. actually it's kinda common knowledge , but I don't want you to feel bad .
If you LOOK at the clip before you tear off the grill .. you'll see ( with a MAG light ) there is actually a second slot in the grill ...
SIMPLY ... use a flat screw driver .. and move the clip end "up " and pull that area of the grill out .
honestly .. the OE clips will last forever , If done right .