As mentioned earlier in this post, you only should be removing your aligners when eating, drinking or brushing your teeth.
When removing aligners, do one side at a time. On one side of your mouth, use your fingertip on the inside (tongue/palate side) of your back molar to slowly pull the aligner from the molars.
Repeat this process on the other side of the mouth. You will be able to feel the aligner coming away from the back teeth.
Once the aligner is fully disengaged on both sides from the molars, you can place your fingertips on the front part of the aligner to remove it completely from the mouth.