We have found that using Nano-Ceramic Window Films will eliminate, or at least considerably reduce this problem.
Apart from the clarity, there are some other advantages with ceramic film.
In coastal areas, where you have salt-spray drifting inland, conventional window film is prone to corrosion over time. This is evident in loss of colour and consequent loss of effectiveness, not to mention the appearance. Ceramics are stable and cannot corrode.
Ceramic film reduces heat more effectively than metallised films and is only matched by the most mirrored conventional films.