The sound of a squeaky pop-out can be like nails on a chalkboard. But that squeak is more than just a nuisance, it’s a sign that your slide-out rails need some tender loving care. Letting your slide-out rails go without proper lubrication can cause deterioration due to rust and corrosion. Don’t use grease it will just attract dirt. Use a dry lube like “Protect All slideout dry lube” available at Sunrise RV.