Lines fuzzy and dotted

Hello
I have used soap bubble and have got fuzzy lines, I have used soften and smooth line tool but still have fuzzy lines
how can I fix to make smooth lines
see attached3D.skp (1.2 MB)

The ‘Dots’ are called end points and can be turned on and off in the styles options.
They show you where each edge segment begins and ends.

if you set your edge style to look like this.

Things should look better.
As @Box said, the dots are endpoints. but your extensions were turned on too.
So, turn both of them off.

https://help.sketchup.com/en/article/3000109
Have a read.

Thankyou Joseph