Top 29 Custodian Interview Questions and Answers [Updated 2026] + Practice With AI Feedback

In my last job, we had to clean the entire school after a big event. I suggested we split into teams for different areas. I led a team cleaning the classrooms while others handled the gym and hallways. By coordinating our efforts, we finished the task two hours early and ensured everything was spotless.

In a previous job, I encountered a situation where a large spill of industrial-grade paint occurred in a storeroom. I quickly alerted my supervisor and used appropriate safety gear. After isolating the area, I applied the proper solvent to clean it. The room was restored to safety in a few hours, and I learned the importance of acting fast and following safety protocols.

In my previous role, I was responsible for inventory checks. During one of the audits, I noticed a discrepancy in the count. By verifying the numbers meticulously, I found items that were misplaced. This attention to detail avoided a potential order of excess supplies and saved the company money.

I first evaluate which areas need immediate attention, like restrooms during busy hours. Then, I focus on larger tasks like floor cleaning that take more time. I always group similar jobs together, so I can complete them in one go. Finally, I keep my supervisor updated if any task needs urgent attention.

In my previous job, there was an issue with a leaking faucet in the break room. I noticed it during my shift and sent an email to the maintenance supervisor detailing the issue and requested a prompt fix. This resulted in the faucet being repaired the next day, which kept the break room clean and usable.

In my previous role at a school, I was told to use eco-friendly cleaning products for a health initiative. Originally, I used traditional cleaners, but I quickly researched and switched to biodegradable options. The staff appreciated the change, and we maintained a clean environment while aligning with the school's goals.

Yes, I had a disagreement about how to clean floors. I listened to my colleague's methods and explained my reasons for using a different approach. We decided to try both methods and see which was more effective, and we ended up creating a combined method that worked well for everyone.

In my previous job, I noticed that the cleaning supplies were often misplaced, leading to wasted time. I organized a proper storage area with clear labels and instructions. As a result, my team found supplies more quickly, which improved our cleaning times by 20%.

In my previous job at a school, I noticed the restrooms were not being cleaned regularly. I took the initiative to organize a cleaning schedule and personally oversaw the cleaning once a week. As a result, the staff and students commented on how much nicer the restrooms were, creating a healthier environment.

In my previous job, I received feedback that I was not consistent with my cleaning schedules. Initially, I felt defensive, but I decided to create a daily checklist and set reminders. This helped me stay on track, and my supervisor noted a significant improvement in cleanliness and efficiency after a month.

I am familiar with industrial vacuums, floor scrubbers, and mops. I clean the vacuums after each use and ensure the filters are replaced regularly. I store them in a dry place to prevent damage. Safety is always a priority; I wear protective gear when handling chemicals.

When choosing cleaning supplies, I first identify the type of surface I am cleaning, like wood or tile. Then I ensure that the product is compatible with that surface to prevent damage. I also consider the specific stains I need to address, ensuring the cleaner is effective. I prefer non-toxic options for safety and check if the products are environmentally friendly.

When handling hazardous cleaning materials, I first read the Safety Data Sheets to understand the properties and risks. I always wear gloves and a mask to protect myself, and I ensure that the area is well-ventilated. Additionally, I store the chemicals according to their labels and follow the manufacturer’s instructions carefully.

I would inspect my cleaning equipment weekly for any signs of wear. After each use, I'd ensure it's cleaned and stored properly. I follow the maintenance schedule to replace filters and belts on time.

I am familiar with using biodegradable cleaning products, like vinegar and baking soda, which effectively clean surfaces without harmful chemicals. This not only protects the environment but also ensures a safer workspace.

If I encounter a persistent stain, I first identify what caused it to choose the right treatment. I would then try a specialized cleaner if I have one, ensuring I test it on a small area first. If it's still there after that, I would ask a coworker for their advice and document my attempts.

I am familiar with steam cleaning carpets, which helps to deep clean and refresh fibers. I always check the fabric type first to choose the right cleaning method. For upholstery, I’ve used dry cleaning techniques to properly clean delicate materials without shrinkage.

I understand that OSHA regulations require employees to be aware of potential hazards. I always refer to the Safety Data Sheets for the chemicals I use to ensure proper handling and disposal.

I keep a checklist of all cleaning supplies and do regular inventory checks. This helps me assess what I have and what needs to be ordered before I run out.

I prioritize using eco-friendly cleaning products, which use less energy to produce. I also plan my cleaning routes to minimize movement and optimize energy efficiency.

First, I would check the area to ensure it's safe before approaching the spill. Then, I would notify my supervisor about the situation. Next, I would block off the area to keep others from slipping and use the appropriate cleaning supplies to clean up the spill. Finally, I would put up a caution sign to alert anyone passing by.

I would first check if the furniture is safe to move. If it is, I'd carefully move it out of the way. Then, I would report it to my supervisor and mark the area to keep others safe.

I appreciate you bringing this to my attention. I will inspect the restrooms and identify any specific areas that need more attention. My goal is to ensure a clean environment for everyone.

I would first look at the list and identify any areas that are most frequently used, such as restrooms or break rooms, as these often need immediate attention. Then, I would tackle the easiest tasks first to make progress and build momentum.

I would start by asking my team members about their roles and any specific tasks that are unique to this building. I would also take notes and ask if I could shadow them to see how they perform their duties.

I would approach my colleague calmly and privately to express my concern for their safety. I would suggest reviewing the safety protocols together to ensure we are both following them.

I would take a moment to breathe and gather my thoughts. Then, I would list my tasks to see which are the most urgent. If needed, I would ask my supervisor for help with less critical tasks.

If I see some areas still dirty after my shift, I would quickly assess how urgent it is. If it's a minor issue, I would clean it before leaving. If it's significant, I would inform my supervisor and document it.

I would remain calm and listen to the feedback, ensuring I understand the points raised. Afterward, I would thank my supervisor for their input and work on correcting the issues highlighted.