Laundry on a Ugandan Line

Thanks to Sara for capturing this shot in Uganda. Here's what Sara says about her photo:

This is my favourite (and probably only) laundry photo. It was taken outside of Mulago hospital in Kampala, Uganda and it is of people drying linens for their family members who are in the hospital. Not even a laundry line but cleaner whites than I ever get.

So many people around the world dry their laundry like this. I took tonnes of photos just like this when I was in Bangladesh, but my rolls of film were stolen from my bag at the airport. I was devestated! Do any of you have photos with laundry drying on the ground like this? How does the cotton dry so clean on the ground?