What kind of solutions/fluids are being sprayed inside windows

Most the low end copy cat companies are using two or three fluids.

First, they use distilled water which is inert and serves little to no purpose in the cleaning of the inside lights of glass ... caution should also we used so as not to flood the spacer bar with water.



Then add any household vinegar, such as Heinz, to the distilled water to act as a cleaner



Then they may use methanol or methyl  alcohol to dry the windows - which can be purchased off the shelf at most hardware, paint stores and big box stores.