Cath says she has wondered for several winters what she could do to try and stop the dark patches on her two bedroom walls. She's a huge cynic of most things that seem too good to be true. But when her Ausclimate Cool Seasons 7L dehumidifier arrived, she can repaint with much more confidence knowing that she has now the solution. Catherine says she began to measure the liquid every time she would empty the machine. She turned into a science nerd for a week or so and couldn't believe what she was seeing. Now, she could detect the difference in the rooms of her 1950's much loved but cold, damp and somewhat mouldy home. Catherine says she cannot recommend Scott and Russell or their product more highly. Thanks again.