According to the online economy report, the slowness of a glass has two main reasons; Either the gear rail assembly, pulleys and glass retaining strips are too dry or there is a feeding problem. If the system is dry, the rail assembly must be opened and serviced, or the engine will be weakened and overheated. Weak nutrition can be due to weak connection of bodies. In cars that do not have a window lifter relay, this problem is more visible (such as the Pride family), which can be greatly improved by adding a feed relay.
On the other hand, your car’s window lifter motor may be broken and need to be replaced as an important part in this regard.