How long should I leave cleanser on my face, and what factors should I consider to optimize my skincare routine? Is there a specific timeframe that is universally recommended, or does it vary based on the type of cleanser being used? For instance, if I am using a foaming cleanser versus a cream-based one, will the duration differ, and how do active ingredients influence this decision? Additionally, should my skin type—be it oily, dry, or sensitive—play a role in determining how long I should allow the cleanser to remain in contact with my skin? Could I potentially reap more benefits by adjusting the time I leave it on, or might I risk adverse effects if I exceed a certain threshold? Furthermore, what are the signs that indicate I have kept the cleanser on for just the right amount of time to achieve optimal cleansing without over-drying or irritating my skin?