By Niamh Kirk If you use a scrubbing brush when you clean your toilet, listen up, as you may be making a common mistake. A cleaning expert has revealed we’re all making one crucial mistake when it comes to cleaning toilets and it’s all down to how you use your scrubbing brush. Hygiene expert Mary Futher, who goes by Madame Sweat warned people against putting the brush straight back in the holder after using it. The cleaning whizz regularly takes to social media to share her tips and tricks for household jobs and personal hygiene and urges people to change their toilet cleaning habits. She took…