To add to this, I like a 4 step process that a YouTuber I watch uses.
Step 1 - Desoil
Get the plant. Remove all soil, or as much as you can, a little dark on the roots is okay.
Step 2 - Clean
Dip it in water (can be tap) and shake it to get all the soil off and clean the leaves. And let it soak for a few minutes. (5)
Step 3 - Chemical Bath
Then into a new bath, this time 5% bleach (just basic bleach none of the scented stuff or anything). Let it soak in this for a few mins (5-10) then throughly rinse the plant (Tap water still fine) then rinse the plants with RO or Distilled to get all the Chlorine off.
Step 4 - Quarantine (if you have the time)
Put the plants back into a Pot, and place them into a clear storage container preferebally with the foam in the top. Water them and stick them under a light. Leave them in Quarantine them for as long as you can (up to 30 days or so). Do not add future plants to this QT chamber, do a few at the same time and QT together.
That is a sure fire way to make sure there is no buggies or pesticides in the plants, for most plants. Some like roses have systematics pesticides that can last for up to 6 months. However for basic plants this is pretty surefire way to assure no issues.
A bad plant can wipe out all your plants, so while you can skip the Quarantine on the first set, I wouldn't on others.