Good things come to those who wash their face before bed...

Cleansing impurities from the skin is the first step to optimal skin health. Choose a gentle Cleanser with a low pH value (no higher than 7) so as not to disrupt the skin's delicate balance. Bar soap has a higher pH and is not suitable for your face.
Cleanse once or twice a day (don't over cleanse).
Remove with Tepid water.
Rinse thoroughly.
Avoid cleansing tools.
Pat dry, no rubbing.
Apply serum, moisturizer while skin is still slightly damp. 

Wash the day's debris off your face as the last step of your day. No matter how many amazing serums, moisturizers and treatments you have, they can't do their job if your skin is not clean.