Ideas on how to dissuade spiders from hanging out?

We’ve got one of these in our backyard. Our kid loves it. Only thing is that spiders seem to love it too—especially the periscope.

Any ideas on how to dissuade spiders from hanging out in there?

I obviously don’t want my kid hanging out with a bunch of pesticides. I’ve tried directing the sprinklers right down the chute, but that doesn’t seem to faze them at all.

I spray it out when I get a chance. And I clear out the cobwebs and take a preliminary peek before giving the okay. Even still, my poor kid has this puffy bite on her bottom eyelid. I think it’s from that darn periscope. :(

I’ve heard of natural spider repellents. But do they work outdoors? With rain and sprinklers, etc?