The cleaning solution should be made in accordance to the stubbornness of the stains on your windows. For dried up stains like insect droppings and mud splashes, make the solution stronger. For regular cleaning, 3 tablespoons in half a bucket of lukewarm water will do the trick. Room temperature water can also be used; however, warm water is advised to remove hard stains. Dip the sponge in the solution (squeeze out some of the excess water) and start washing the window panes. Don’t worry about scrubbing away stains; that’s the squeegee’s job. The sponge wash is just needed to wipe off dirt on the surface and to get the windows wet and soapy for the next step.