Dave Liquorice wrote:
On Mon, 10 Aug 2009 11:38:10 +0100, Toby wrote:

We had a windows with loads of stickers on it ,and they all came off
with just a Stanly knife blade (bare, not in the handle!) scraped
against the glass - I expect this will work for these!

Well that was painless.

'Orrible sticky gunk but seemed more intent in sticking to itself
than anything else. Stanley blade to lift the bulk and then pressed
hard against the glass got most of the residue off. Found that
detergent based liquid hand soap would shift what remained on the
blade, my fingers and the glass. B-)

Missed the beginning of the thread so apologies if this has already been
said.
Cellulose thinners remove a lot of adhesives including window stickers
and sticking plaster mess. They also dissolve plastics and are highly
inflammable. Be careful.
Nail varnish remover might also work - also needs careful use to avoid
collateral damage