Bubbling is a common problem on do-it-yourself window tint. The bubbles appear over time from age as the tint strips' glue weakens. They also emerge from dirt present on the window when the tint was installed. There are two options for getting rid of bubbles in the tint. You could peel back the tint pieces and reapply, following steps to keep the result bubble-free. You also could attempt to deal with individual bubbles, although the effect will not look as polished and will not last as long as reapplication.
Aim a hair dryer set on high at the tint, holding it about three inches away. Move the hair dryer over the area for several minutes to loosen the tint's adhesive backing.
Peel back the tint layer carefully, working slowly so as not to rip the strips. Lay the tint flat in an area where it will not be disturbed or get dirty.
Mix a soap solution of one teaspoon of baby shampoo to two quarts of water in a spray bottle. Spray the solution over the inside of the window, where the tint will be installed and clean thoroughly. Use the scrub brush to remove small pieces of debris. Run a squeegee over the clean glass to dry it. Inspect for stray dirt or debris and repeat if necessary.
Put on latex gloves to prevent any dirt or oil on your hands from getting under the tint. Bring the tint back to the window.
Saturate the adhesive side of the tint with the baby shampoo solution. Center the tint panel on the window and gently push the middle section onto the glass.
Use the squeegee to smooth the tint onto the window. Starting from the centre, smooth the tint until it lays perfectly flat against the window, with no bubbles. Work out toward each edge until the tint is reapplied. If the bubbles reappear, gently peel that section of tint back, moisten the area again with the shampoo solution and repeat the squeegee motion.
Allow the tint to sit undisturbed for several hours, so the adhesive can dry onto the glass.
Poke a very small hole using a safety pin at one edge of the each bubble you would like to remove. Ensure that the hole is as close to the border as possible.
Line up an empty syringe over the hole and pull the plunger up, sucking out the air. Alternatively, place your finger flat against the bubble edge opposite of the hole and push down and toward the hole. For example, if you make the hole at the bubble's top centre border, place your finger at the bottom centre and drag it upward.
Use a credit card to smooth out the bubble, flattening the bubble mark against the glass.
Work quickly to clean the glass when following the first method, as you need to reapply the tint before the adhesive hardens.
The second method of removing individual bubbles will probably eventually result in more bubbles on the tint. This method is better as a temporary fix or for someone who does not wish to reapply the tint.