You can't do this with a laptop...
Letter in today's Telegraph:
SIR – Following Anthony Garcia’s advice (Letters, March 29), we have discovered an eco-friendly use for the Telegraph Business section. It is exactly the right size and consistency to clean our orangery windows.
Which followed this:
SIR – For more than 100 years my family owned a wedding gown shop in Bristol. My grandfather and father cleaned the inside of the windows with soapy water and dried them with newspaper (Letters, March 28).
The use of newspaper left the windows shiny and without a smear.