Does it stop working at night or while the vehicle is parked in a garage? 

Nano Zone Coat Mobility is a photocatalytic coating technology that does not form a film. Because it works when exposed to light, no reaction occurs in a completely dark environment.

However, this does not mean that the effect disappears. The self-bonding titanium dioxide applied inside the vehicle remains firmly fixed to the treated surface and begins working again when exposed to light.

It also reacts to ordinary light encountered during normal use, such as natural light when getting in and out of the vehicle or while driving and light from the vehicle's interior lamps, so it continuously provides its effect during normal use. Even at night or in dark environments, it reacts if there is light from sources such as LED lighting.