The preference for using "warsher" instead of "washer" is likely influenced by regional accents and dialects. In some dialects, particularly certain Southern American English dialects, the pronunciation of certain words may differ from the standard or more common pronunciation.
The pronunciation of "warsher" instead of "washer" can be attributed to a phenomenon called metathesis, which is the rearrangement of sounds or letters in a word. This linguistic shift can occur naturally over time, leading to variations in pronunciation.
The preference for "warsher" may simply be a regional or cultural characteristic of certain dialects. It's important to note that language variations and pronunciations can vary widely depending on geographical location, cultural influences, and individual speech patterns.