Take the time to check your newly printed parts:

Clean up strings with tweezers and a hot air gun (be careful).

Carefully check inside the holes of the X ends, where the smooth rods will be inserted.

Remove any elephant foot with a deburring tool.

Check all bridges. If a bridge is falling in its center: heat tweezers with a lighter(or use a soldering iron) and press on the area with the poor bridging, to make it more flat.

Make sure the filament path through the extruder body is clean, round, and clear from obstructions.