Texture bakes glitchy

Hi, I am experiencing a problem when baking textures in blender. I tried to see online if anybody had the same problem but their solutions didn't fix anything. Sometimes when I bake my texture gets glitchy and has black triangles over it. Similar threads said there might be some normals overlapping. When I first made my mesh I tried the duplicating the mesh and flipping normals so the inside wasn't see through, I thought it was because of that my texture turned out like this. So I made my top again but instead of flipping the normals I used the solidify tool to give it volume (which I have done many times before and never had any problems) and the mesh still bakes wrong. Is there anything I'm forgetting? Please let me know.

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