If you have your manual/information package, check it for specific instructions from the manufacturer.
If I remember correctly, our popup said only to wash the tents on the outside with plain water. You do have to be careful as the material can be damaged and then your waterproofing may negatively impacted.
The #1 most important thing - making sure it's 10000% dry before storage!
2012 Flagstaff V-lite 30 WTBS
2011 Ford Expedition
4 kids and a hubby & never enough time to camp!
2011: 17 nights 2012: 26 nights 2013: 46 2014: 20 2015: 16