How to Clean Suede Shoes & Boots
For heavy stains on suede footwear, use a suede cleaning block (also called a suede eraser).

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 What is Suede?
suede was originally used for women's gloves. Suede leather is also popular in upholstery, shoes, bags, and other accessories, and as a lining for other leather products. Due to its textured nature and open pores, suede becomes dirty quickly and is especially susceptible to stains. As it is not washable, but must instead be cleaned carefully with special suede cleaners, it is not recommended for daily-wear items. When suede gets wet, it turns a darker color and can become damaged easily, as water drives out the essential oils that keep suede leathers supple. It is difficult to waterproof or stain-proof suede leather.
 When you buy shoe stretchers, you'll want to ask how the particular stretchers should be used, but normally, you'll need to use a shoe stretching liquid or spray. This will help to saturate the material, and allow the shoe stretcher to work better - follow the instructions for the product you purchase, as each one is a little different.Insert the shoe stretchers into the shoes, making sure they are expanded as much as the shoe will allow before inserting them.Turn the knob to begin stretching the shoe. You will usually have to leave the stretcher in at least overnight, and sometimes for 24-48 hours. The longer you leave the stretcher in, the more the shoes will stretch, so you might want to try a shorter period of time first, as shoes that are too loose don't feel good either. 
Stretching your shoes is not difficult, but it may take a little practice to get used to the whole process. Practice first on a pair of shoes you don't care as much about before you ruin a pair of Manolo Blahniks by overstretching them.Alternatively, you can contact a shoe repair shop if you're uncomfortable with the idea of stretching your shoes yourself. They will be happy to stretch your shoes for you. They may also be able to recommend specific products or shoe stretchers for the kind of shoes you need stretched.
Shoe stretchers will work best for suede, leather, and other natural materials. Shoe stretchers don't work as well on vinyl, because the material does not have as much give.Shoe stretchers are also best suited to breaking in shoes that are barely too tight, or expanding shoes that are close to the right size. If you're looking to stretch a size 7 to a size 9, you want a new shoe, not a shoe stretcher. 
 The Pain of Tight Shoes & Shoe Stretchers 
Protect Your Leather Shoes from the ElementsThe Right Protectant for Your Shoes
Different weatherproofing products serve different purposes, so you should choose wisely. For example, if it is essential that your shoes are waterproof because you spend a lot of time in wet or messy conditions, and a pretty finish is not as is important, a beeswax product would be a better choice than a protective spray. Beeswax 
products form a protective layer over the surface of the shoe or boot instead of being absorbed into the leather. This provides a better barrier against water, but the additional layers can alter the appearance of the shoes. If the appearance of the shoe or boot is of more importance than the weatherproofing properties, a spray protectant should do the trick.
By providing a breathable barrier against mild to moderate wet conditions and dirt, this type of weatherproofing product is virtually invisible on your shoes or boots. Joe's Shoe Service sells a large variety of waterproofing products including those for smooth leather, suede or nubuck.
Additional Tips for Leather Shoe Care 
From : Desiree Stimpert,
Source : Shoes
 
As I was looking for certain shoe polish products, I was surprised to find warnings that shoe polish contained toxic chemicals and could actually be considered very dangerous. While I know most of us have had shoe polish around the house for years, probably without any problems, the warnings I found were of enough concern to me that I wanted to share the information with all of you. Below is more information about the toxicity of certain shoe polishes, as well as alternative and traditional polishing instructions.Important First Steps to a Proper Shoe Shine
use saddle soap or a smooth leather shoe cleaner. Shoe cleaners come in gels, foams, sprays, liquids and creams. Many leather cleaners come with an applicator top, or you can use a soft shoe brush to aid in removing dirt from the surface of the shoe. This will also help to remove dirt from any cracks in the shoes. After cleaning, let the shoes dry for a few minutes and begin shining the shoes with a soft cotton cloth - either a shoe shine cloth, or even an old t-shirt, as long as it's soft and made of cotton.
Getting Ready for a Shoe ShineBefore you begin, you'll want to make sure to you're prepared for the shoe care process. Work on top of newspaper, wear gloves, and work in a well-ventilated area. These precautions are essential, as many shoe care products contain toxic chemicals that can be very harmful - more information on this in the shoe polish
enough to take care of them. It's also about preserving and adding to the life of your leather shoes. Whether you spend a lot on your shoes, or don't have much to spend, taking care of your leather shoes makes sense. In the case of designer, or more expensive shoes, look at it as though you're protecting your investment, or what could be a future collectible. And if you don't have a lot to spend on shoes, keeping the ones you have in great shape will remove the need to buy new shoes for every occasion. There are important distinctions between caring for smooth leather shoes and caring for suede, exotic skins, nubuck, or athletic shoes.
From : Desiree Stimpert,
Source : Shoes