Yes, you can wear it in the shower. But wearing it in a bath or hot tub is not recommended.
No, the actual size of each leg may be different. Putting it on the other leg could confuse the measurement comparisons.
Your skin may become dry and sensitive. Apply some hand lotion or moisturizer under the strap area.
The anklet must be worn consistently to get valid results. We recommend that it be worn continuously.
We recommend that you use a mild soap and water.
Just put it back on. The software will recognize that there is missing data and adjust accordingly.