Wipers stopped working

About two years ago, we got a new front window put in. And Since we had to replace the wipers four times because they did not wipe correctly. Could the new window be at a different curvature that the wipers do not work correctly?

Four cylinder front wheel drive automatic 130,000 miles

I saw your answer regarding the passenger side wiper not working and you told them to tighten the nut. This keeps happening to me. Is there a may to tighten it up and keep it tightened?

Occasionally for the past year, the tranny seems to slip, or hit a flat spot. It does not happen very often and when I take my foot off the gas and reapply the car runs fine. I have been waiting for my tax check to arrive so I can bring it into a transmission shop to check it out, but I was curious what you think. It tends to occur at around forty and sixty mph.
Thanks

Four cylinder two wheel drive automatic 96,000 miles

the windshield wiper on the passenger side will not work. When I move it with my hands, it spins around.

Four cylinder front wheel drive manual 100,000 miles

My windshield wipers just stopped working. They do not work on any speed, nor does the washer fluid work. Where should I start on maintenance?

Six cylinder front wheel drive automatic 200,000 miles

I am writing because I would like to know what can be done to fix my windshield wipers. I am driving an Elantra wagon 1999.
They are not moving and I have tried replacing the fuse and still nothing but it sounds like I can hear the motor running.

Any Ideas as to what the problem can be?

Sincerely,

Lonewolf71