My door closer on a screen door has been closing slower and slower and now takes a long time to close.

I've tried adjusting but that doesn't fix it.

I'm guessing it needs some kind of fluid. What do I need and where does it go?

Thanks!

 

Door closer eventually wear out and are not designed to be repaired.Replace the unit.Remove it and take it with you to a hardware store to try and get the nearest replacement that matches the length etc of the original unit.Note that you may have to deal with replacing the brackets and so forth as they often do not match and there is no standardization.Avoid big box stores for this as you'll need qualified sales help to assist you.

 

Turning the adjustment screw on the end counter-clockwise should speed the closer up. If that has failed, I agree it would need to be replaced. Assuming that your closer is like the most common type, you might notice when you look for a replacement that there could be a couple sizes (the diameter of the cylinder is slightly bigger on some, slightly smaller on others.) In my opinion, the larger diameter cylinders are stronger and last longer than their smaller counterparts. (estimated 1 1/4" vs 1"). So my advice would be, if you have a choice buy the larger one to replace your current closer.