There is no starch in the potato vodka after it's processed. It doesn't matter which vodka you use so buy the cheapest you can find. I found Linen Laundry Spray at Walmart that seems to be the same as Best Press. It was $4 for a big bottle. It was in the detergent aisle. Later moved to the ironing board aisle, then I found it with the mops and brooms. I bought all on the shelf last time I found it. I bought a case of the Bounce Ironing Spray when it was on clearance for $1 a bottle at Walmart when it was discontinued. I do use a lot of the sprays and it does add up money wise over the year.