Now many years ago, when I was a child, I foolishly pelted the streets nosy neighbours window with eggs(Dont mess with anyone named Dilys). OMG how I paid for it.
She "instructed" my mum to send me around her house the following day with a bucket of water & a rag. I spent HOURS cleaning 1 window. Of course, I have never done it since. God Bless window cleaners!
I so know what you mean about dried on egg! Asda should be made to pay for their foolishness.