Spotting a gleambow meteor can be a pain. If you go on a race and a gleambow starts you will receive a tooltip (the press E to learn things that tell you how to play the game). There is one for Gleambow Race:
You want to make sure that this tooltip is UNCHECKED (like shown in the picture). You can navigate to this window by clicking Tab> Knowledge>TIPS at the top right of the window> Scroll down to the 5th section called combat and you will see Gleambow Race.
If this has no checkbox beside it, it means it will show up the next time you encounter this event (just like if you uncheck the furnace one, the next time you click on a furnace it pops up).
When the tooltip pops up, never hit to ‘learn it’. This will cause it to keep popping up. It pops up whenever a Gleambow Meteor spawns above you, the moment it spawns.
This is faster detection then if you just keep looking. Once the tooltip appears on your screen just look up, find the direction and chase it down. This will significantly increase the speed at which you are hunting meteors.