Automatic Washer is an inexpensive item that can be bought from the cheap items section in Nook's Cranny. You can also find it inside the balloons.
You can't craft Automatic Washer but you can buy it from the sellers below.
Source notes: Available in Nook's Cranny (upgraded only), in the unique furniture slot
|Craftable: No||Customizable: n/a||Catalog: Yes|
|Source: Nook's Cranny||Size: 1x1||HHA Series:|