Which part of a pwc is dangerous to your hands, feet, and hair?

PVC (Polyvinyl Chloride) is one of the most widely produced synthetic plastic polymer. PVC produces a great deal of vapor which can cause eye irritation, headaches, dizziness and respiratory problems. When heated, PVC products can produce HCL fumes, which are toxic to humans.
Skin contact with PVC may lead to a painful, itchy red rash. Prolonged, repeated exposure can lead to dermatosis (a skin condition affecting the face and neck). Therefore gloves must be used. If contact occurs, the affected area should be immediately washed with water.

Maybe try moving the plants to somewhere else, or elevating the structure where the plants currently are