HOW TO TAKE CARE OF YOUR NEW CUE
As a thin, tapered piece of timber you cue needs to be looked after
 in order to avoid warping. If not cared for,
any cue regardless of quality, will warp.
Following the advice below will ensure that your cue remains in perfect condition for every game.
Store your cue upright in a cue rack or vertically in a cue case in a cool, dry place
Keep your cue away from radiators, hot pipes and out of direct sunlight
Do not lean your cue against a wall
Do not lean on your cue when playing
Do not bang the butt on the floor
Finally in order to check the straightness of a cue rolling
 across a table is not a good indication, instead sight along the cue.

Choosing a good case

Cues can sometimes cost several hundred pounds or a player can

have one cue for thier whole lifetime so never under estimate how a good strong

case can protect it from physical damage, heat damage, water moisture damage and sunlight U/V damage

the difference in the cost of a case is marginal so spend wisely.