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The stronger and more direct the product, the more likely it is to remove dirt and calcification with minimal scrubbing. However, some build-ups and stains can be incredibly stubborn and might even resist a strong cleaner and some intense scrubbing. If this sounds familiar, our top tip is to leave a product to sit overnight and then scrub down the bowl with (and we’re aware this may sound odd) a pumice stone.Harpic Power Plus sits at the top of our list because of its strength and versatility. This toilet cleaner targets a wide range of problems – its formula works on stains, removes limescale and rust build-ups and also kills germs and bacteria. With everyone trying to do their bit by being a little greener, environmentally friendly cleaning products have become increasingly popular in recent years. Eco-conscious companies tend to make products that use less harsh chemicals – for toilet cleaners, look out for products that are certified as less damaging to marine creatures, as all that flushed water can eventually end up in the ocean. This will depend on the problems your loo is causing and how involved you want to get with them. For general day-to-day cleaning, a strong multipurpose cleaner should take care of things nicely. If you have problems with limescale or want your toilet to be sparkling white, then you’ll need to add more specific products, such as a limescale remover or a whitening product, to your cleaning arsenal.