A customer in Fremont California reported that their chef line refrigerated drawer unit wasn't working right. Our technician found the coil very dirty with grease and lint, blocking 70% of the coil. Washed the coil out thoroughly with cleaner and cleared the drain line. Unit dropped back down to 36 degrees. Cleaned out a second drain line on the next cooler, that unit is at 35 degrees. Drawer coolers running normally again.