When is the right time to ask someone to clean the glass during the Spring Festival?

It's best to invite someone to clean the glass one or two days before the 23rd of the twelfth lunar month, because the Chinese New Year is coming soon, so there is no time to clean the glass. Besides, the 23rd of the twelfth lunar month is also a day to avoid the Kitchen God, who will reply to the Jade Emperor, so it is best to clean the glass before the Lunar New Year.