Share 'Agarose gel drying out during experiment'

Hi, I am trying to do an experiment about the extracellular slime trails and external memory of physarum polycephalum. For that I am using 1-2% agar in petri dishes but some of the newly made ones are just a couple of days old and they have already evaporated. It starts with the agarose gel getting wrinkly and then water vapor gets to the lid of the petri. The slime that I was experimenting on ha…