pIt is best to clean your brushes before the paint dries, of course, but if your brushes have dried paint on them, you can still salvage them and put them to good use again. To remove latex paint that has recently dried, use hot water and dish soap by first /p
For mysterious, quantum-mechanical reasons, the screws that hold handles and doorknobs always eventually work loose. A few drops of thread-locking compound will permanently fix the problem, yet still allow you to remove the screw with ordinary tools if you need to later. A heavier-duty variety is also available for large bolts and machinery.