the 'somehow they get broken seals' is caused by this
cut glass measured for the respective customer,more than likely paid before assembly starts,is placed on a carpeted heavy wood table,,'cleaned' with
the house mixture of blue windex like glass cleaner,with a towel,,,,,,
unh unhunhunh. bad,,the step all of them need to apply is using glazers pumice boiled clean cotton rags, a small bucket of warm water,glass is coated with filmy plastic beads,looks like just a bit of dust all over,this grit has to be removed,until the glass is squeaky clean,,it literally squeaks when this grit is removed,,the plastic beads prevent cases of 600 lbs of large glass sheets from shattering during the long trip from where the glass is rolled & cut to shpg sizes,,,,,, most glass window outfits use the same technique,make the same goof,the nasty smelling grey adhesive
encasing the 2 glass sheets fails quickly,a 30k$ order of new house windows may have3 or 4 like yours,,1100 bucks you have to blow 3 years after the window guys finish up & pack tools in the van a & head out back to the factoria or stop for a beer
home owners ought to raise hell with these guys,all you get is 'sorrysorrysorry for your difficulty what can we do to help fix this??
the response you usally get when you mention this is the dumb dog on bugs bunny going