FORD 2002 Escape v.1 - Manual (Page 101)

To ensure proper sliding function of your rack, keep the rack
clear of debris. If debris is visible inside the roof c-channels or
side rails, spray the items clear with a water hose.
Do not load large or bulky items (i.e., plywood, mattresses) on
the rear of the vehicle so that they extend above the roof line. In
addition to blocking your rear view, they can also cause dangerous
driving situations and possibly cause damage to your vehicle. Use
additional care when driving with reduced visibility.
Only load cargo in the designated area. Loading outside of the
approved area could result in personal injury as well as vehicle
damage that may not be covered by warranty.
Driver Controls
101