We assess how effective the garment steamers are at removing creases. We use synthetic organza, silk, wool, a cotton shirt, denim jeans, a poly-cotton shirt, dresses and curtains for the test. The performance score accounts for 70% of the overall score. Linen doesn't typically work well with garment steamers, so although we test this, we don't factor the result into the performance score.

We check how easy it is to fill the water tank, how comfortable the iron is to hold, the convenience of the hose, the functionality of the hanger and how easy the controls are to use. The ease of use score accounts for 30% of the overall score.

We test how well the garment steamer smooths out creases from silk.