Although home remedies can solve some drain blockages, many blockages involve serious issues that need to be handled by professional and experienced drain cleaning engineers. 

The pipes can be sealed off by the build-up of grease, oils, and fats, especially in colder weather. A blockage in the drain pipes can also be caused by the build-up of non-flushable objects such as sanitary pads and napkins, or intrusion from tree roots and other external factors. 

Without the proper knowledge and tools for removing blockages, your drainage system may end up with irreparable or expensive damage. So instead of depending on DIY or over-the-counter solutions, you should rely on experts for the job to avoid your drain block problem from getting worse.