My moisture trap sits on a window sill and the system works well. The crystals last a few weeks.

This product is brilliant and well worth buying. There is one big downside the crystals are so difficult to get out of the bag. It is really frustrating and extremely annoying.

We are very pleased with the moisture traps, we have one in both the bathroom and conservatory, it is surprising how much water they absorb.

I use this frequently and finds works really well with condensation and keeping damp at bay.

These crystels worl very effectively without being too intrusive to the eye.