Here's what I have been finding. I keep getting sent back on our installers new installs. When I get there I keep finding overcharged units. Its usually 90 inside and 90-100 outside when they are setting these units. They say they are charging them to 10 degrees subcooling. When I go back the indoor temp is usually 70-80 depending on the person. The outdoor temp is still 90-100. My subcooling is extremely high around 40-50 degrees. I always remove refrigerant to reach 10 degrees subcooling. What is going on here and how can I help them stop overcharging these units?