Mixing Retin-A with Water--OK to Do?

I wet my face before applying Retin A because it goes on smoothly and evenly and I only need to use a pea size amount to cover the whole face? If I use the same amount, it is not diluted--the same amount is applied as when I do not wet my face. Question: Does the water deactivate the Retin A? Is this a good idea or bad? Thanks.

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