Deleting multiple user waypoints

My routine with my GNS 430W was to plan all of my flights at home on ForeFlight, and then upload them into the panel when I get to the plane. This also works well for an out and back flight; while the navigator forgets the route after shutdown, ForeFlight remembers, and a simple upload gets the plan back onboard. No need to use a saved route.

One byproduct of this usage model is that each waypoint that does not correspond to a charted waypoint is stored as a user waypoint in the navigator. On the GNS over time these waypoints clog the display up, and since I have no reason to keep them, every once in a while I’ll go into the user waypoints list and select the menu item “Delete all User Waypoints”. Problem solved.

Now, with the IFD, not only will I create new user waypoints, I may also start collecting rubber band waypoints when I modify routes, which appear also to be stored in the IFD user waypoint space. Happily, they don’t show on the map unless you reference them in a route, but they do still collect in the WPT display. 

How can I mass delete all of these waypoints? I’m thinking that creating a blank excel spreadsheet and importing it might do the trick, but if there is an easier way, short of individually CLRing each one, I’d like to know what it is.

Thanks!