It's the flooding problem most of all. I'm in one of the few Manhattan co-ops that still allows washing machines and dryers and it's a wonderful thing to have it in my apartment. But many landlords, co-op board and condos don't permit them because of the flooding.
Sodium acetate or hot ice is an amazing chemical you can prepare yourself from baking soda and vinegar. You can cool a solution of sodium acetate below its melting point and then cause the liquid to crystallize. The crystallization is an exothermic process, so the resulting ice is hot. Solidification occurs so quickly you can form sculptures as you pour the hot ice.
5. Pour your solution into a tray or container. Be careful not to spill any, and make sure the solution doesn't come into contact with any solid sodium acetate. This step is optional, but in case you want a better container in which to view the hot ice formation, here's your chance. 6. Touch the solution with a bit of the solid sodium acetate on a toothpick.