As PJ stated - there might be something on the table to move... a few of them may be under stuff... and may need to click it specifically... rather than the "whole" thing on one...
Viewing post in Need a Hint?
Ok. So a little more. You will need to time it to get to the room across from you (straight across) - and you will need the item from the cart to open the door. Once you stand right in front of that door, the Roombas generally miss (as long as you get as close as you can) before using that item. Inside that room is an item (easy to miss) which will turn them off.