Hi and welcome Lindycg,
Your advice certainly is of use. Thank you for sharing with us.
However, some crystals shouldn't be wet at all because it will cause them to break, and some shouldn't be put out in the sun to clear them as it will cause them to fade. I have experienced both these scenarios with crystals that I cherished and thought I was doing the right thing by.
The safest way I know of to clear crystals is to use Reiki on them, and this has the added advantage of programming them for healing if this is our intent. It is also quicker than burying them in earth or placing them in moonlight.
Om shanti
Alison