If children suffer from shocks caused by static electricity when using a slide, there are a few options to address this.
Increase humidity: Static electricity is more likely to build up in dry air, wiping the slide with a damp cloth with a soap solution will briefly solve the problem. The soap residue then forms a film on the slide surface of the slide so that when used, children will not be statically charged.
It is important to address this problem because shocks from static electricity can be uncomfortable and even painful for children, and may discourage them from using the slide in the future.