Remove the lid. Get a pair of your mums stockings/tights place over mouth of the sweet jar and secure with an elastic band. depending on the species you have depends on whether they like it airy or humid.
If you save your pocket money the Exo terra range of tanks are excellent for anyone wanting to take up sticks for any length of time.
But any cheap tank with a lid will do.
depends on sp really ,
some prefer humid - so just melt some (quite a few) holes.
some prefer drier/airier - so mesh lid is good .
all methods said previously are good , but if you want cheap mesh , use old net curtain or any fine stuff from a material shop