How do you clean tall full-height windows/glass wall?

[mrenotalk 0]

For landed homes, how does one clean windows or glass wall that is, say, 2 storeys' high?

Are there cleaning companies that specializes in this area?

Pls share your experience.

Thanks

[GreenHornet 2]

http://www.windowwasher.com.au/how-to-tips i hope it helps

[GreenHornet 2]

How was it?