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BAKING SODA FINGER
If douching seems like a little more extreme than you care to go, you can try this technique instead. An hour before you plan to make your attempt, wash your hands (well!) and wet the tip of one of your fingers. Dip it into the baking soda and then insert it into your vagina and pull it back out again. You may even enjoy having your husband do this (TTC sex is LAME so anything we can do to spice it up, right??) Try not to touch your skin when you do it, because it might sting and cause irritation.
This method helps to raise pH a bit without washing away the CM but it's probably not as effective as douching.
I haven't been wetting the tip of finger.