Some products still have a certain effect on removing formaldehyde, but the effect is not as exaggerated as the merchants say, because the release cycle of formaldehyde is relatively long, even as long as 10 years, so it cannot be completely removed in a short time. There are many harmful gases in the newly renovated house, so it is necessary to keep indoor ventilation and replace harmful gases. However, the effect of this method is relatively slow, and the ventilation time should be long enough, otherwise formaldehyde cannot be completely removed.