Amonia and bleach don’t make meth. It makes mustard gas.

As for what the police will think if they search your moms house, you’re thinking about this from the wrong perspective.

The cops are never there in good faith. The cops are never there to get to the bottom of the real story. The cops are not an element of justice. We don’t have a justice system. We have a legal system. If the cops are already searching your place, they don’t give a shit about your intentions, your behavior, your motivation, or your innocence. They already made up their mind long before they showed up.

It doesn’t matter what they think. They’ll plant evidence if they find none. They are not above being dirty cops.

If they’re already searching your house, it’s too late.