I am getting Invisalign in a few months, do you brush your teeth every night with them on?

Hello!
With Invisalign, you always remove your trays to brush and floss in both the morning and at night. Never eat or brush with them on. 

No, you remove the aligners to brush and floss. You brush after each meal and before bedtime with the aligners off. You also thorough brush the inside and outside surfaces of the aligners at least twice per day.

It is always important to brush and floss your teeth before bed. Remember to remove and clean your aligners before you put them back in