(Water Simulation) fluid passes through the effector. Help!!

HI Jeremiah TTamunathor ,

Could you provide us with a link to your .blend file, please (via Googledrive, Dropbox, or so)?

Simulation are tricky to troubleshoot and a screenshot alone is rarely enough.

It could be a number of things...
An image(s) of the fluid settings would be helpful, naming objects would also be useful.

My first guess is you're using the can object as the effector object, right?
The liquid is inside the effector with the normals facing out, correct 99% of the time.
Try duplicating the can object, scale down a fraction and flip the normals, and use this as the effector.

My first guess would be that the can's wall is too 'thin'...Adding a Solidify Modifier might help, or ticking the Is Planar checkbox...

But so much can be wrong, that I'd really prefer to see the file

Exactly, a solidify would do the same thing really, give the object internal facing normals.
The .blend file would help enormously with solving this.

HI Jeremiah, I don't understand why you have two cans, but anyway, the Solidify Modifier should be above the Fluid.

Also, I don't think you need the Subdivision Surface Modifier.

I Deleted Can.002, cleared the Cache and Baked All and it seems to work perfectly (nothing goes through the can...)