STEP 1: Login to Mews using your login credentials.
STEP 2: Click on the Reservation Overview icon (1)
Then click on Arrivals (2) to view all the guests coming in/checking in for the day
Click on Check in
STEP 3: You will be directed to their reservation details.
Click Check in
STEP 4: Tick the Make inspected box (but make sure that housekeeping has cleaned the room already).
Click Check in.