This cracking and peeling has nothing to do with cleaning or sunlight. The material is cheap Chinese. Mine were replaced under warranty and a year later started again on both Captain Chairs and Euro's. Went back and forth with Georgetown with no luck but went to FR Rally in Goshen this year for the first time and they replaced everything, no charge. The new material looks like quality but only time will tell.
2009 Georgetown GTX3600
2005 Honda Trike
Nights Out: 2010=104, 2011=118, 2012=96, 2013=114, 2014=120 & 2105=112