Magic for the winged shoes?

[ruthie]

... I have the shoes, but I need some spark of magic to get them flying again.

A hint, please?  I'm probably missing something really obvious here ...

[flitchard]

[spoiler]Hmm... Y'know, I'd love to zap those guards...[/spoiler]

[spoiler]Ever scuffed your feet on a cheap carpet then touched someone?[/spoiler]

[ruthie]

See?  I knew it was obvious!  Thanks!