This cleaning hack byMD Service Centeron YouTube shows how to remove freeze over ice in 1 minute.
It takes only hot boiling water to defrost the built-up ice that grown.
Its very simple to remove the freeze over ice without any hard tools or supplies.

Image by MD Service Center via YouTube
To avoid this problem again, double-check the freezer is in the right setting that it is recommended.
Also, confirm you close your fridge or freezer shut so nothing melts and freezes over again.
Supplies:
Directions:
First, turn off the freezer and unplug it.

ensure the switch is turned off.
Take everything out of the freezer and store it in a cool place when doing this cleaning process.
Use hot boiling water to pour over the freezer ice.

Overall, this is a quick and easy process that doesnt require any tools except hot water.
So, you could remove that and dump it out.
However, if you dont, just soak up the way with a rag and wring it out.