Search for special characters in Discovery Accelerator

In our company we have a product with a + in its name; lets just call it SuperWidget+

This is a new product. We have sold the normal SuperWidget for years but SuperWidget+ is a different product. 

My problem is when I search with Discovery Accelerator for SuperWidget+ or "SuperWidget+" I find not just this term but also all the SuperWidget terms (without the +). So I get thousands of invalid search results which include just the old product.

How can I search for this special product name that includes the "+"