quick question about this render


Very much a newb to blender so I apologise if this is an obvious thing to fix… I modelled this simple cup and turned on smooth and set the subdivision modifier to 5. In the CTRL+Z render preview the cup looks fine. However when I make a final render the handle on the cup has a few blocky parts to it (pics attached)

Just wondering if anyone had any ideas? Ive attached my render settings also

Many thanks

Have a look at the Subsurf modifier:
It has different settings for viewport and render. Viewport is set to 5, render is set to 2.

Ahhh thanks! I completely forgot to reset it. Thank you very much