Infrared Obstacle Sensor Gets Random Interference - How to fix

Using Arduino Sensors
1

Hi there, I have 1 infrared obstacle sensor. It works fine in my bedroom but when I move it into the kitchen, the sensor becomes triggered when there's nothing in front of it. It's only a single sensor so it shouldn't be interfering. What could be causing this. I am taking my project to a science fair at the library and I am worried that it will not work at the library. What are possible sources of infrared interference in a library or in a room. The sensor works fine when it's in my bedroom.

If I can't fix the problem with the infrared. Then what other on/off obstacle sensors are there. I already tried ultrasonic and it isn't good enough for my use. It doesn't have to be a distance measuring sensor. I just need on/off. With range of 30cm

Thanks

2

What are the differences in lighting between the bedroom and the kitchen?
Daylight? Incandescent? Fluorescent? LED?

3

My room has LEDs kitchen has the long tube ones.

Which ones will be a problem?

What if sunlight comes in through the windows at the science fair?

What other obstacle detecting sensors are there?