Headlight fogging: causes and solutions

Headlights fogging is a common problem, what danger does it pose, how to avoid, what could be the reason and how to solve them so that the headlights remain working and at the same time beautiful?


Headlight fogging: how to deal with it


Misting automotive optics is a serious problem that almost any car owner may encounter. But if the subtle moisture sheet, after washing or a sharp temperature drop, is not so terrible, then the serious condensate inside the headlight indicates that it is time to sound the alarm.


The danger of fogging headlights


Decrease in lighting efficiency. The headlights on car faces of modern cars provide good lighting thanks to a rather complex own design and, most importantly, proper adjustment. And the presence of fog on the glass or lens will definitely distort the light beam, which will entail a decrease in lighting efficiency, and as a result a deterioration in visibility.


Corrosion and oxidation. With increased moisture concentration, all elements inside the headlamp are corroded. Many elements are affected by oxidation and rust, including a reflector, which over time completely loses its properties. The oxidation of the contacts disrupts the normal operation of the electronics, and the ignition units can even “drown”, because they are usually located at the bottom of the headlamp.


What is the reason for fogging headlights


The main reason for headlights fogging up to a commonplace is simple - loss of tightness. The reason for this may be a violation of the tightness of the seams and seals, cracks in the body and glass (plastic). Sometimes clogging of ventilation ducts and breathers is observed, which reduces proper air circulation and leads to the formation of condensate.


Even the new headlights of some cars can fog up. For example, in the Audi Q7, when the headlights are in operation, the upper and middle part of the glass are “heated” by running lights and a directed heat beam of light from the lens, and the lower part of the glass remains cold, which leads to the formation of condensation in the lower part.


Water can get into the spotlight after driving in the rain or even after washing. And sometimes, it is necessary to observe the veil even after entering a warm box after a frosty trip. And if you do not pay attention to it in a timely manner, then the consequences can be irreversible.


What to do


It is impossible to get rid of the problem of fogging on your own. You can only take certain measures that will allow you to temporarily postpone the trip to the service.


Increase ventilation. Remove the headlamp cover, which will significantly increase air convection, and this in turn will dry the condensate inside. In some cases, you can even blow off the headlight with an ordinary hairdryer, if of course it is at your fingertips.


Turn on the light. Any lamps and even LED elements during work emit heat. The included lighting will increase the temperature inside the headlamp and also contribute to accelerated drying.


Use moisture absorbers. As a temporary solution, you can use any available moisture absorbers, for example - silica gel. Put a few bags in the headlight, but note that they will need to be removed from there later, and from moisture, they can even swell and damage the internal components of the structure.


And if these “folk” methods have had their effect, do not delay the solution of the problem anyway. Only qualified intervention will help solve the problem of standing fogging.


The right solutions


The only sure way to get rid of moisture in the headlights is to contact a specialized workshop where they can qualitatively diagnose the condition of the optics, find out the reasons and make the necessary repairs.


Specialists, first of all, dismantle the headlight and check its tightness by pumping air and creating excessive pressure inside. Thus, it becomes possible to find even the smallest microcracks in the body, glass or joint seals. For example, almost every fifth Toyota Camry 40, thus easily reveals the factory leakage of the right headlight due to the leakage of the sealant.


If a gap is found in the joints, the headlight is dismantled, new seals are installed, and the sealant is replaced. It is almost impossible to carry out this procedure on your own and without a special tool - there is a great risk of breaking something and such a repair may end up with the purchase of a new headlight.


If cracks are found in the plastic housing of the headlights or in plastic glass, they are sealed, also using a special tool. And even minor glass cracks can be sealed using special glue that does not change the optical characteristics of the glass itself. For example, the appearance of small glass cracks today is inherent in some Audi models. If the glass has cracked severely, one cannot do without its replacement.

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