I use bicarbonate of soda mixed with water to make a paste to clean the bathroom and kitchen, its great! Also this isn't homemade but tipping cola down the toilet works a treat to clean it.. half a lemon with some salt in it absorbs smells in the fridge
I recently took an order of bicarbonate of soda soda crystals borax soap flakes and acetic acid. I also have beeswax and almond oil for furniture polish and candle making materials and essential oils to replace air freshener.
I've had mixed results with some recipes found online. Ie hm laundry powder and descaling spray great. All prpose surface spray so so Enamel scrub crap and went all lumpy.