If you have ever nailed a picture to a wall or accidentally caused a hole while moving something, you have probably used spackle. Spackle is a thick substance used to fill holes or cracks in walls or ceilings before being sanded and painted to provide a finished surface. If you need spackle but don't have any,
or want to avoid spackle filled with chemicals, there is a homemade version that works well for small holes and cracks.
Mix 2 tbsp table salt, 2 tbsp cornflour and 4 to 5 tsp of water in a plastic container or small bucket.
Stir to make a thick paste.
Apply to walls or ceiling with fingertips or a spackle spatula, then allow to dry. Sand and paint if necessary.