Improper selection of defoaming agent: Different defoaming agents are suitable for different application scenarios and foam types. If the selected defoaming agent is not suitable for the current application scenario or foam type, it is difficult to play the defoaming effect.

Poor quality of defoamer: the quality and stability of defoamer will also affect its defoamer effect. If the quality of the defoamer is poor, it is difficult to play the due defoamer effect.

Insufficient amount of defoamer: The amount of defoamer should be adjusted according to the specific application scenario and foam type. If the amount is insufficient, it will be difficult to remove foam.

Improper application scenario of defoaming agent: The application scenario of defoaming agent should be selected according to the type of foam and the characteristics of defoaming agent. If the application scenario is improper, it is difficult to play the defoaming effect.

Other factors: The effect of antifoaming agent is also affected by other factors, such as water quality, temperature, stirring speed, etc. If these factors are not appropriate, it will also affect the defoaming effect of the defoaming agent.

Therefore, if your antifoaming agent does not work as expected, you can try to check whether the choice of antifoaming agent, dosage, application scenarios and so on are appropriate, or consult relevant professionals for help.