To use hot:  Squeeze the metal coin located inside the hot pack until you hear a click!  The liquid will begin to crystallize and heat up. To speed up crystallization, simply shake the pack until it is completely crystallized. Massage the pack for a few seconds to make it soft and pliable.  Apply to desired area of your body.

To use cold:  Place the pack in the refrigerator while still in liquid form until cool. DO NOT PLACE IN THE FREEZER. Freezing may cause damage to the pack. If placed in the freezer, after a certain amount of time, the  extreme cold will activate the hot pack and once removed from the freezer, while it may appear to be frozen, it in fact needs to be boiled to return to its liquid state (leaving it out will not "un-freeze" it as it never actually froze in the first place.) 

Place the hot pack into a non-stick pot or crock pot of boiling water to melt the crystals back into liquid form. If you do not have a non-stick pot, use our cotton boiling pouch or place a wash cloth or such on the bottom of the pot to prevent the pack from possibly sticking or burning.  You can boil as many at a time as fit in your pot. 

Depending on the size of the pack or number of packs being boiled at the same time, it may take anywhere from 5 to 30 minutes to melt the crystals back to liquid form. (For example, the hand warmers only take about 5 or 6 minutes in the boiling water to turn to liquid again.)

NOTE: If the crystals are not completely liquefied, they will re-crystallize and you will have to boil the whole pack again to be able to re use it. So it's best to just boil out all the crystals the first time.

You will know it is done when the crystals have been liquefied and the pack is completely clear. Remove the pack from pot. Allow pack to cool and you can click it to activate its heat again anytime thereafter.