Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: How do you sharpen the blade?
Document: This machine is just about useless unless you want to tell your friends you own a slicer. The gap between the slide and the blade is 3/8 of an inch which means everything tears out at the bottom. the blade is of such low quality that when you sharpen it with any pressure it bends over. The back stop flexes so badly that if you use even a little force you will get a cut so tapered that it is useless .
Has a weak motor which causes the blade to slow significantly as soon as anything but soft lunch meat hits it.
Blade wasn't very sharp, has trouble cutting. The motor area is not sealed well and fluid can enter when cutting / cleaning.
This slicer would not even slice bulk bologna from the store. It is poorly made, plastic gears, slow rotation of the blades, and the difficulty in blade removal/attachment earned this slicer such a low rating.
The sliding tray doesn't come off for cleaning. The inside is dirty when I first got it. Surface behind the blade is rough and it's hard to clean back there with a sponge.I don't think it's safe because food particles can get stuck in the rough metal surface inside the machine.
Awesome little machine I used to have one something like this one only it was plastic with a metal blade. This one is built much nicer. You still can't push the machine to hard but for a home product it's just what I wanted. It's not a Deli slicer like a Hobart but for home its wonderful Thank you!
I received this product for Father's Day. It is hard when you are so disappointed with an item because you don't want to hurt the families feelings. This thing is such a poor design, it should be pulled off the shelf. It is not an easily cleaned item. An item like this requires that you clean it after every use. To clean requires that you pull the blade off to get inside the blade guard exposing the greased "plastic" cog gears.
I knew I wasn't buying a Caddilac, but I thought it would have been a little better quality than it is. The sliding tray cannot be removed for cleaning unless you take two screws out of the rail and remove it. The area behind the cutting blade is not well shielded from small scraps of meat, which makes clean up a bummer. It turns at a very slow RPM, so it takes a great deal of care and effort to get a good cut on each pass.
(addtional expense) The plastic guard intented to hold your food on the food table is not engineered with a grove or any way to hold the paddle to the food table, such as a slide bar or rod. The guard easily flips over and pops off which is dangerous. There isn't enough room to fit your hand underneath the spinning blade to catch your sliced food so everything slides of the slanted back and falls directly onto your countertop unless you first placed a cookie sheet underneath before you began.
Despite reports from others about it being hard to clean, I have found it to be no big deal. Added a screwdriver to the utensil holder on the counter. CAUTION (common sense) against getting cut when cleaning the blade is needed but not difficult. A toothbrush gets to the intersection of blade and frame. HOT water is needed. Shaves HAM = to deli thin. Slices bread at half inch (or less). Uniform pepperoni slices have improved homemade PIZZA. Sliced soft Halloumi grilling cheese with success.
Answer: I take the back part of the slicer off (the section used to adjust thickness).  I then take a pull through kitchen knife sharpener and use the base of the machine to stabilize it.  Turn it on and let the move the sharpener closer to the blade until it starts to grind.  You can repeat the process if you have coarse and fine sharpeners.  Alternatively, they do make sharpeners for these which are basically a pull through sharpener shaped like a pen that will fit between the depth gauge and still be able to contact the blade.  I didn't waste my money on that because I already have the other type of sharpener.