Elsa's place is in my favourite location in Madrid, lots of restaurants and shops. The host who met us was very accommodating and kind. Would recommend staying here. Note bathroom is a bit old.
That aside, my dad did use a dish towel to wipe up eggs he dropped at 4am as we were rushing out to the airport, he wanted to ensure there was no mess on the floor. She charged $37CAD to replace the towel, understandable but quite expensive and petty.