A lava lamp is a novelty item that is used more for decoration than illumination. The colored wax rises and falls in interesting and mesmerizing globular shapes. However, sometimes the wax breaks up into small droplets or bubbles, which detract from the aesthetics of the wax’s flow. Lava lamp owners oftentimes want to remove them or reincorporate them into the larger balls of wax. You can try a few strategies to get rid of them.
Turn off the lamp and let it cool for two hours. Small bubbles of wax commonly form when the lamp is overheated. During these two hours, the bubbles will drop down to the bottom of the glass globe and hopefully be absorbed by the larger balls of wax.
Turn on the lamp again after two hours, and turn it off again as soon as you see small bubbles of wax forming again.
Replace the lava lamp's bulb with one of smaller wattage if the problem persists.