Be clear and concise when you fire them Firing someone is a serious task, therefore it has to be taken seriously. Do not beat around the bush like asking how's the weather doing which could drag it out.
Treat the firing process privately This is because when you fire an employee in front of other employees, it could potentially bring down the morale and the mood of the workplace.
Firing someone is always a bad experience for managers or founders to handle. If you are reconsidering firing the employee or you have a bad employee to manage, check it out here.