If it's an electric bubble machine, check whether it's out of power. Most bubbles accumulate at the outlet of bubble feet because of insufficient power. You can try a new battery. If it's out of power or the power is too low, such a situation will occur. Because of insufficient power, bubbles can't spit out, and they will accumulate at the outlet.

Then check whether there is air leakage in the machine. If there is air leakage in the bubble machine, the real situation will also appear. Or see if the mouth that spits bubbles is broken. This broken mouth is difficult to repair and can only be replaced.

Extended data

There are various formulas for bubble water, but the main types of ingredients are water, surfactant and thickener. Distilled water is best for bubble water, because there is no impurity in distilled water. Ordinary tap water contains calcium plasma, which will combine with surfactants (soapy water) to reduce the effect.

It is not only the detergent with proper proportion, but also the thickener that can make the bubbles grow longer and stronger to ensure the stability of the bubbles. There are also many choices of thickeners. Glycerol and syrup are commonly used, which can be bought in pharmacies and supermarkets.