I know we’ve talked before about the changes to Amazon’s Subscribe & Save program, and now you have to have 5+ S&S items in a month to save 15% or 20% on everything. Generally speaking, I have no difficulty hitting that 5 item mark each month, because we still don’t have a Costco. (Also, I’m still bitter that we don’t have a Costco.) But every now and then, I have enough laundry detergent and dishwasher pellets and protein bars or whatever, and I find myself looking for a cheap way to get my total up for that additional savings.

Enter… Magic Erasers. I always need more Magic Erasers. Right now this 4-pack is just $2.99, and when you buy it via Subscribe & Save it’s not only cheaper than that (just $2.39 for me, because I have Mom Prime), it’s an easy way to up your total number of S&S items for the month. Here’s another secret, too: Want two boxes? Do them as two separate subscriptions, and you’re 40% of the way to having your 5 items for the month.

Warning: New boxes of Magic Erasers may cause you to circle the house, randomly scrubbing at walls and muttering about how grimy your children are. Or maybe that’s just me.