Wipers noise

I'm talking about a specific noise (squeak):

1. wipers should not be used for few days
2. the blades are lifted away from windshield, so the blades can't be blamed
3. after the first 20-30 cycles the noise gradually disappear

The truck was 3-4 months old when I was first time at an touchless car wash (before was hand washed). Next day I used the wipers and I heard the noise. I suspect poor design / cheap parts installed by Toyota.

At dealership I was told it's normal... So I can't stop thinking: Is dealership trying to save Toyota's money? Or do they know they can fix but is coming back (poor design)? Am I crazy?

I would like to know how many of you had this specific kind of problem and how you dealt with it!

Thanks!

 

wd40

 

where?