doubleglazing

[juliebrown2]

we have condensation on a window which I havent had fixed yet what is puzzling me is the appearance of two funny little circles which appear in the mist during the day does anyone know why they are there?

[mrpeter]

They could also be where a sticker has been on the window at some time help to identify the installation job. The fitters then remove them when they have completed the job.We have several such marks on our windows some of which are rectangular.