Well, if that’s how you’re doing it, you have another problem: you’re brainstorming wrong.
Here are some guidelines from Quartz for how to set the stage for divergent brainstorming:
Expand your circle. Invite people to the brainstorm beyond the team you’re used to working with, and beyond the team that’s used to thinking about this problem.
Clarify the problem. Make sure everyone understands the problem. Also, look at it from as many angles as you can—challenge your assumptions about its cause and implications.
Go for quantity over quality. “No bad ideas” is the mantra of brainstorming, but without a replacement for quality, you can be left without a goal to work toward. That’s where quantity comes in. Generate as many ideas as you can—you’ll worry about what’s good later.
Embrace playfulness. What you’re really going for is creativity, and you know who’s great at unrestrained creativity? Kids. To whatever extent you can loosen your proverbial professional tie, do it. Get back to that weird, free brain you had when you were a kid. That’s where the crazy—and excellent—ideas are.