I took my screens off to clean the windows. Had trouble getting them back on again too. Would get one side on then the other side would pop off. I cannot give you any suggestions but to keep trying. I just tried to put one side on and held it really tight and then pounded the other side in. They finally went back on. Good luck!!!
David, Darla, Dawson, Dessa, Doogie the Doggie & Daphne the Camper
2002 Jayco Eagle SE 304bh