Can a Salicylic Acid acne treatment loose its strength?

Acne 3 Comments »
duwoppers06 asked:

I’ve been using the clean & clear advantage acne spot treatment for about 2 years now, and I’ve never purchased a new tube. Recently it seems as if, instead of clearing up my occasional breakouts, it’s making them worse! I’m wondering if this could be happening because the tube is worn out and the salicylic acid has lost its ‘acidity’.

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