Defrost water (ice) on freezer bottom

My refrigerator is a freezer on the bottom model. I have ice collecting on the bottom of the freezer. If I take it out, it collects again the next day. I have turned the water supply to the ice maker off with no change in symptoms. I’m thinking the drain for defrost water is clogged. Is there a quick way to clean the drain without taking the whole freezer apart?