A UV cabinet does not sterilise. Below extract from a post by Envy on this topic.
In most cases nail technicians should only need to disinfect to a hospital grade (as we do not perform invasive or surgical proceedures. I've added below a summary of what each means to you as a nail tech.
Sanitation - greatly reduces the number of pathorgens or bacteria on a surface
The first form of sanitation is a good ol clean with soap and water, this should be followed up with a good hand sanitiser, such as cool blue
Disinfection - kills all pathogens on a surface and is almost as effective as steralisation
This is the highest level a nail tech should (generally speaking) need in a salon (although local laws may override and require steralisation at certain items) A hospital grade hard surface disinfectant is required to disinfect all hard surfaces, abrasives and impliments between clients. (of course follow the manufacturers guidelines) For a disinfectant to be effective everything must be sanitised (cleaned) first. You can not disinfect yourself or your client as it kills living organisms
Steralisation - Completely destroys all liveing organisms on an object or surface, including fungal spores.
The easiest way to steralise is to use an auto clave, obviously this is only effective on metal impliments as it would destroy most near everything else. Steralisation is generally only required where bodily fluids or blood are present.
I would strongly recommend you invest in additional training materials or a reference book such as Doug Schoons Nail structure and product chemistry (edition 2)