Ionic-native Remove marker not working

Ionic Framework ionic-v3
1

Hello, I’m simply trying to remove markers from my existing map. I feel like it should be easy. I tried 2 different methods but both get the same error:

Uncaught TypeError: Cannot read property 'apply' of undefined

First method

RemoveMarkers(){
while(this.markers.length > 20){
    
         let tempMarker = this.markers.pop();
         tempMarker.remove();

      }
}

Second Method

      let marker = new GoogleMapsMarker(markerOptions);
  
      this.map.addEventListener(GoogleMapsEvent.MAP_CLICK).subscribe(() => {
        marker.remove();
      });

I can’t find anything online, and most similar questions don’t use Ionic-Native.

Thanks