My dometic refrigerator is not freezing properly.

If the refrigerator is 38 degrees and the freezer 18 degrees , both are not normal.

Have you used any hard and pointed object to remove any frozen food or Ice before this happen?

Have you notice any oily part coming out in the freezer or at the back of the refigerator which will indicate that there was a leak?

there are few factors that may cause your refrigerator to be like that:

1. A possible leak along with the tubing that will cause to loose the refrigerant which make the refrigerator to produce ice.

2. lost Compression (Motor compressor) this happen eventually specially the refrigerator is more than 10 years old

the best way to find out is to call a technician and have them check it