H.lividum(Cobalt blue) slings keep trying to escape from the substrate

[Xerinex]

I rehouse my H.lividum sling into a enclosure with coconut fiber as substrate n i water one side of the substrate as i know H.lividum like moisture n high humidity. I found that the slings keep trying to climb up away from the substrate or trying to escape. I wonder if something is wrong about the enclosure. I only rehouse the sling about an hour ago. Heres a picture of the enclosure. The substrate smells coconuty heavily as it is smoothened coconut husk, i wonder if this is the reason. The black colour substrate are potting soil i used for its previous enclosure (i change the substrate as i water the enclosure too much and i found that potting soil clump together when moist and are hard for the sling to dig).

 

[Jesse607]

The substrate can be moist throughout. Let the spider settle into its new enclosure, this can take anywhere from a few hours to a few weeks.