The change in seasons also means you'll start to notice condensation gathering on your windows, particularly in the mornings when temperatures are usually at their lowest. Luckily, there's an incredibly cost-effective solution that can help keep your windows dry this autumn and prevent condensation from forming, reports the Mirror. If placed strategically around your home, it can be used to absorb water vapour from the air, thereby keeping your windows free of condensation. All you need to do is fill a small bowl or jar with table salt and place it on your windowsill. Once the salt clumps together, that's your sign to replace it with a fresh batch to keep it working effectively.