For those of you with wood stoves, here’s a great tip I got from here. You can wash your fireplace tiles with a mixture of vinegar and water – rinse off with plain water and give it a wipe to dry. Then take some of the ash (cold ash!), dip a damp cloth in it and then wipe the wood stove window with it. Rinse with clean water and buff with old newspaper. To give your stove a beautiful shine, wipe with vegetable oil (you can also use vegetable oil or baby oil to clean dirty marks off your stainless steel appliances).
NB you can also use ash as a compost enricher – just sprinkle some before putting the compost down. Don’t use too much though!