And yet, in the Apple Store, you'll find the 32-percent isopropyl alcohol Clens wipes by Bausch & Lomb. Apple declined to explain the contradiction. Nevertheless, the wipes work great at cleaning grime, muck and marks off your device and they also disinfect. A Clens kit that includes three Clens wipes, a 3-ounce bottle of Clens cleaning spray and a cleaning cloth costs about $20.

不过，在苹果商店里，你可以找到含32%酒精的博士伦清洁擦拭巾(Clens wipes by Bausch & Lomb)。苹果并没有解释这种自相矛盾的说法。尽管如此，这种擦拭巾在清洁电子设备上的污垢、灰尘和印迹方面非常有用，而且同时能够消毒。一包清洁套装中包括三张清洁擦拭巾，一瓶3盎司的清洁喷剂以及一块清洁布，要价20美元左右。

But it's far cheaper to make your own alcohol and water solution. To clean his own mobile devices, Mr. Meister at the Geek Squad said he used a 1:1 ratio of 70 percent isopropyl alcohol and distilled water, which together cost less than $4 at most grocery and drugstores. "You want distilled water and purer alcohol so there are fewer chemicals or minerals left behind when the solution evaporates," he said.

但如果你自己用酒精和水调制清洁剂的话，就要便宜得多了。奇客小分队的梅斯特说他为了清洁自己的移动设备，会用1比1的比例把纯度70%的酒精与蒸馏水混合，在绝大多数杂货店和药店，这些东西加起来不会超过4美元。“使用蒸馏水和更纯的酒精，这样在清洁剂蒸发之后，残留的化学物质或者矿物质就会更少，”他说。

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