Giles Coren and Monica Galetti visit a hotel in South Africa that has been built into a 187-foot tall former grain silo and which also incorporates a museum of contemporary art. They are challenged to wash the building's 96 windows inside and out, and discover how staff have coped with the challenge of keeping the place clean in the wake of the worst drought to hit Cape Town in a century.

• Giles Coren
• Monica Galetti
• Robert Rinder