Against ivy on walls

Ivy sticks to walls and it's not always desired to have it's grasping claws in your walls and crumble them.

Take a sharp knife and scrape it from the wall in case pulling causes more damage.

Then take water with lots of salt and wasking up liquid and put it to whatever is still against the wall. Soak it as well as you can.

After that you can rub it off with a firm brush.