What if the curtains don't shade the sun?

I suggest you buy a new shade cloth! It's not very expensive.

Shading fabric curtains, which are very cheap in China, cost more than ten yuan a meter, and the width is generally 145CM. If it is a sunshade roller shutter, it is generally made in 50 yuan /M2 and imported from 80 yuan /M2 or above.

I hope I can help you!