General advice for care
Like most cosmetic and medical products, a little common sense goes a long way. If you have lost the instructions for an item, then just use your head for success with acne skincare products. You know more than you think you do.
Keep your acne skincare products out of the direct sunlight and away from high humidity. For example, don't keep your acne skincare in the bathroom where you take hot showers; the heat and humidity can affect the formulation of your skincare product.
Likewise, keep the acne skincare products out of reach of children. The active ingredients may be toxic to small children and who wants to take that chance?
General advice for storage
If you are confident in moving forward without any kind of directions, you can also apply your common sense to storing your acne skincare products. For example, you should probably keep your skincare products in a drawer or cabinet that isn't in the bathroom.
Make sure that you keep your products in the same place all the time so you always know where to find them and don't spend time hunting down your skincare products. If you are careless and misplace them, then it is just a waste of money.
Also, if you have had your acne skincare products for a while, check them periodically to see if they have changed color, if they have changed consistency, or if they begin to give off a foul smell.
Any of these signs can indicate that the product has gone bad and should not be used. As you can see, it's easy to maintain proper care and storage of your acne skincare solutions.
Just use your head and any accompanying instructions that were packed along with your purchases. Sensible steps can ensure that you have as much time to use your hard-earned products as possible.