Escalating problem

I'm not sure when this started happening, but I'm having a real problem on escalators. Considering I have to use the damn things at least 8 times a day, it is getting a bit worrying. Travelling on them seems to be ok, it's the getting on / getting off bit that I'm finding problematic. More specifically, the part where the stairs turn into the flat bit is the trickiest. I've lost count how many times I've nearly fallen face first over the last couple of weeks. Now I have developed a mental problem when using them. It's like I'm 4 years old again.