Even with perforated shade piece closed too much sunlight enters and interior gets hot. Any remedies to prevent sunlight from coming thru and into cabin?

 

You'll have to find a way to put some heat reflective insulation between the glass and the rear screen. maybe something that has adhesion strips as well. Window rain visors will also allow you to leave one window slightly open to let air circulate.

 

I had both of my sunroof windows tinted by a mobile tinting service that came to my home. In 2012, it cost me $150. Glad I did it.