Tumble Dryer When drying my dryer leaves black marks on the clothes

Since no dryer I am aware of uses any liquid, I suggest you may be putting wet clothes into the dryer.
This can happen if the washer does not spin the clothes nearly dry. Many dryers have small holes in the dryer drum to let excess water flow out, I would guess that may be the case with yours.
Are your clothes nearly dry when they come out of the washer?
If not, perhaps the washer has a loose belt or has a problem with the "dry" cycle.
God bless your efforts.

Sounds like the rollers are worn out. If they are fine then see if the dryer has glides on the drum.

Are we talking tumble dryers here as it's been posted under the 'washing machine' section?
Anyway all depending on what type of dryer you have, normal vented one (with outlet hose that you stick out of the window) or a condenser dryer? Get back to me I may be able to help you with this ok, cheers, Ken.

Controls

• The control unit on the tumble dryer will vary among different makes and models. The main purpose of the controls is to allow the user to select the drying cycle. You can choose the time and temperature setting on most units, while others allow custom settings such as moisture sensors and end-of-cycle alert signals. The controls may include a dial or a touch panel and LED screen display. Some tumble dryers allow you to independently select the appropriate time for the load you are drying and separate programs for temperature.
  

Motor

• The motor inside the tumble dryer spins the basket to allow the clothes to tumble while being dried. The tumbling action allows the air to pass through the clothing to dry them faster. Heating laundry that is stagnant will likely dry the clothing on the outside while leaving damp clothing inside the pile. The constant motion, along with the heat and steam created by heating the clothing, reduces wrinkles. The motor also powers the fan that delivers the heated air to the basket of laundry. The heater can be an electrical element or gas powered.
  

Clean dryer soak a towel in water and bleach , put towel in dryer and dry it it will claen the inside of dryer worked when we had pen marks in ours made the clothes blue has to do it twice

If your clothes get marked or torn in your dryer, check these: Rollers Rear seal Front glides Front seal Rollers Your dryer may use rollers, or wheels, to support the rear of the clothes drum. When these are worn out, they may cause the clothes drum to drop down slightly, which can pinch the clothes between the top of the clothes drum and the rear of the dryer interior. When the rollers wear out, you need to replace the whole set. Rear seal Your dryer may have a felt-like seal at the rear of the drum. If this seal is worn, torn, or missing, clothes can get caught and torn in the space between the clothes drum and the rear of the dryer interior. When the rear seal wears out, you need to replace it. Front glides Your dryer probably uses nylon or plastic glides at the front of the clothes drum for support. When these are worn out, they may cause the clothes drum to drop down slightly, which can pinch the clothes between the top of the clothes drum and the front of the dryer interior. When the glides wear out, you need to replace them as a set. Front seal Many dryers have a felt-like seal at the front of the drum. If this seal is worn, torn, or missing, the clothes in the dryer may get caught and torn in the space between the clothes drum and the front of the dryer interior. When the seal wears out, you need to replace it.

Most likely the front drum bearing part number 5303937139 needs to be replaced. Instructions come with the kit.

Clothing gets caught in the front of the dryer as it spins. This is leaving black marks and wholes in our clothing.

washer dryer and dryer ony machines differ in a huge way. the big diff. is the drums on each are completly different sizes. the conventional dryer has the bigger, giving better air flow and tumble to clothes. the w/d has a smaller drum thus less air flow and less tumble between clothes. the best way to see this effect is remove half the clothes after a wash and then select a drying cycle. u will see that by giving the clothes more room to tumble free of each other rather than tumbling in a large ball will dry them. washer dryers are really only a marketing tool.
(ex main brand engineer)

throw a clean pair of old sneakers in the dryer with the clothes. this should not allow the clothes to stay in one place during the entire dry cycle