The refrig is Model ET8HKXM003

Question

The refrig is Model ET8HKXM003 and Serial # E54044751 Manufactured 10/05. It is type 18TFA. The Temp is currently set on 3 (normal). The freezer appears to be leaking down into the refrig as I find water on the top shelf of the refrig every few days. Food in the freezer stays frozen and the refrig seems to be the right temp. Could smthg in the defrost mechanism be clogged? Any help will be appreciated. Thank you!