Q. Why is my lava lamp cloudy?

A. Lava lamps become cloudy for two reasons; either they have been shaken or moved whilst hot or they have reached the end of their life (2000 hours). You can purchase a replacement bottle for your lava lamp here.

Q. Why does my lava lamp have bubbles in the glass?

A. Lava lamp bottles are manufactured in automated bottling factories. Small bubbles are a normal part of this manufacturing process, it is not a fault.

Q. Are Mathmos lava lamps suitable for children?

A. Mathmos lava lamps are premium priced interior products, they are not toys. They should be placed well out or reach of children under 14 years old.

Q. How long should it take for my lava lamp to warm up?

A. Lava lamps should start working within an hour to an hour and a half of turning them on. First they will form stalagmite shapes, then they will start to form lava lamp shapes.

If you lava lamp does not warm up in this time it may be positioned in the wrong place or the room may be too cold. Lava lamps should be positioned away from drafts and air conditioning. The room should be at least 20 degrees centigrade.

Q. My lava lamp just has one large bubble sitting at the top of the bottle that does not move?

A. The lava lamp is overheated. It could have been on too long (more than 8 hours), so please turn it off and allow it too cool. Or it is positioned in a room that is too hot (more than 24 degrees) or next to a heater.  Please reposition your lamp.

Q. How should I dispose of my lava lamp bottle when it reaches the end of its life?

A. Please make a hole in the metal cap with a sharp point, then pour away the liquid. The bottle may then be recycled through your local recycling centre.

Q. Can I buy new liquids for my lava lamp?

A. Lava lamp bottles are a sealed unit and so we do not sell the liquids separately, but you can buy a new bottle and contents for Mathmos lava lamps here.

Q. Can I buy a new cap for my lava lamp bottle?

A. Lava lamp bottles are a sealed unit and so we do not sell the cap separately, but you can buy a new bottle and contents here.

Q. Why is my lava lamp bottle not sitting straight in the base?

A. Lava lamp bottles do vary minutely as part of the manufacturing process. Turn your bottle round so that it finds a good fit with the base.

Q. How long do lava lamps last?

A. Mathmos Lava lamp bottles last for approximately 2000 hours of use. After this you can buy a replacement bottle here.

Q. Where can I buy replacement bulbs for my Mathmos lava lamp?

A. Mathmos have large stocks of replacement bulbs for our lava lamps available here.

Q. Can I buy a replacement bottle for my Jet?

A. We are afraid that Mathmos no longer stocks replacement bottles for the discontinued Jet model.

Q. Can I buy a replacement bottle for my Lunar?

A. Yes these are available here.

Q. Why has my lava lamp made strange stalagmite shapes?

A. This is a normal part of the warming up process. Please leave it on longer and then it will start to form moving lava shapes.

Q. My lava lamp is not lighting up?

Please check that your bulb is working.  You may buy a new bulb here. Alternatively, please check the integrity of the fuse in the plug.