As an expert in clean beauty and skincare, I can provide you with some insights regarding the efficacy of The Ordinary AHA (Alpha Hydroxy Acid) in addressing blackheads.

AHA is a chemical exfoliant that works by dissolving the bonds between dead skin cells, helping to remove them and promote cell turnover. While AHA can be beneficial for improving overall skin texture and unclogging pores, it may not specifically target blackheads as the primary concern.

Blackheads are formed when pores become clogged with excess oil, dead skin cells, and other impurities. They appear as small, dark bumps on the skin's surface. While regular exfoliation with AHAs can help prevent the formation of blackheads by keeping the pores clear, it may not completely eliminate existing blackheads.

To effectively address blackheads, it is important to incorporate a comprehensive skincare routine. This may include:

1. Cleansing: Use a gentle cleanser to remove excess oil, dirt, and impurities from the skin.

2. Exfoliation: Incorporate AHAs like glycolic acid or lactic acid into your routine to exfoliate the skin and prevent the buildup of dead skin cells.

3. Salicylic Acid: Consider using a product containing salicylic acid, a beta hydroxy acid (BHA), which can penetrate the pores and help dissolve blackheads.

4. Retinoids: Retinoids, such as retinol or adapalene, can help regulate oil production and promote cell turnover, reducing the occurrence of blackheads.

5. Moisturization: Ensure your skin is adequately moisturized to maintain a healthy skin barrier and prevent excessive oil production.

6. Sun Protection: Protect your skin from harmful UV rays by using a broad-spectrum sunscreen.

Remember, individual results may vary, and it is essential to patch test new products and consult with a dermatologist for personalized advice.