The invention pertains to a robot cleaning system that includes a robotic cleaner having a tactile sensor and a barrier unit, wherein the barrier unit is such that the tactile sensor on the robot cleaner is triggered by contact with the barrier unit. As a result the robot changes directions. The barrier unit can be adapted to avoid sliding, such as when the robot comes into contact with it. The anti-slide element can be projections such as hooks or rubber grommets and the like.