To clean marks such as those from crayon, pencil, marker pens or grease, off washable walls, make a solution of bicarbonate of soda and warm water and wipe over. If any marks prove hard to shift, sprinkle dry bicarb on a damp cloth or sponge and scour gently. (It is a good idea to test out an inconspicuous area of wall first, just in case it isn’t as washable as you thought!)
If you are going to vacuum the carpet, it will be much fresher afterwards if you sprinkle it with bicarbonate of soda first. Leave it for about 10-15 minutes, or overnight if possible, then vacuum the carpet until all traces of powder have disappeared.
Looking for an excellent general-purpose hard-floor cleaner that costs pennies? Try dissolving a handful of bicarbonate in a warm water and use as normal on a floor mop. Wring out well to avoid saturating the surfaces.
Grimy metal furniture can be brought back to life by cleaning with a paste of bicarbonate of soda and water on a damp cloth. then polish with a piece of baking foil, wipe down with a clean damp cloth and dry carefully with kitchen paper.
Furniture that is painted white can quickly lose its brightness. Bring it up like new by wiping faded items over with a solution of two tablespoons of bicarbonate of soda to one pint of warm water. Rinse and dry.