water droplets on the front port.
Whenever you want to take a half & half photo (half the picture under and half over the water level), you will find some drops sticking to the front port above the water level.
To avoid this, rub the outside of the front port gently with a slice of apple. The fruit acid in the apple will break the surface tension of the water and stop the drops from forming. Depending on the water (salt or fresh water) the application must be repeated after about 3-5 minutes and can be repeated as often as necessary.
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