Psi4 clean + scratch space

Hi,

Just wondering about the psi4 clean operations. It appears even when I include

psi4.core.clean()

While the folder where the calculation is running is cleaned some files are left in my scratch directory typically either starting with psi.xxx or ending with .npy or .dat.
I was wondering if there is a clean function for my scratch space as well?

Additionally, is there a way to set my scratch directory using psi4 with python rather than as an environmental variable in linux?

Version = Installed with conda psi4 1.7

All the best,
Jay