I can't say I've ever personally used a pore strip but between my sister, my wife and various ex-girlfriends over the years, I have become familiar with the general concept of what they do. Among other things, I couldn't help but notice that they're not exactly cheap for being something you're going to throw away in minutes.
Thankfully, I wasn't the only one to notice the issue. YouTube makeup tutorial queen Michelle Phan also had the same idea and went ahead and found a way to create her own pore-cleansing product. All you need is to combine a little milk and gelatin together and microwave for about 10 seconds before applying the paste to wherever you need it. Peel it off after it dries and you may be surprised at just how much it pulls up.