Why Your Dryer Takes Too Long to Dry Clothes

Quick answer

If your dryer takes too long to dry, the usual causes are restricted airflow (a full lint screen or a clogged vent), overloading, or clothes coming out of the washer too wet. Clean the lint screen and check the outside vent hood first. This guide is for beginners who want safe, simple checks before calling a qualified technician.

Safety first

• Unplug the dryer, or switch off its breaker if you can’t reach the plug safely, before cleaning the lint screen housing or the vent.
• Lint is highly flammable. A slow dryer with a clogged vent runs hotter inside, which raises the fire risk.
• Stop using the dryer right away if you smell burning, see smoke, or the outside of the cabinet feels unusually hot.
• With a gas dryer, don’t pull the dryer out or touch the gas line or valve. If you smell gas, leave the home and call the gas utility or 911 from outside. Keep a carbon monoxide alarm working nearby.
• Never remove panels or reach inside the dryer cabinet.

Before you begin

Check that you’re using a cycle with heat and a sensible temperature for the load. Many dryers have a “sensor dry” or “auto dry” setting that stops when moisture sensors (small metal strips usually inside the drum, near the lint screen) detect dry clothes. If those strips are coated with residue, the dryer may stop too early and leave clothes damp.

Look up your model’s manual so you know what its cycles and indicator lights mean. Many models show a “Check Vent” or similar alert, but wording and codes vary by brand and model, so confirm in the manual or on the manufacturer’s support site.

Possible causes

Things you can check yourself:

• Full or coated lint screen. Lint, plus a film from dryer sheets, can block airflow even when the screen looks fairly clean.
• Clogged or crushed vent duct. Lint builds up in the duct and outside vent hood over time; a kinked or flattened duct also traps moist air.
• Overloading. Clothes need room to tumble so warm air can reach them.
• Very wet clothes from the washer. If the washer isn’t spinning or draining well, the dryer gets a much heavier load of water.
• Mixed loads. Towels and jeans with light shirts make the cycle run until the heaviest item is dry.
• Dirty moisture sensors. Residue can confuse sensor-dry cycles.
• Cold or damp laundry room. A chilly space can lengthen drying time somewhat.

Problems that need a technician:

• A heating part that’s working only partly or not at all
• Lint buildup inside the cabinet, which requires removing panels
• Long vent runs inside walls that need professional cleaning
• A faulty sensor, thermostat or control

Safe checks to speed up drying

1. Clean the lint screen before every load. Pull it out, remove the lint, and look closely. If it seems coated, wash it with warm water, mild dish soap and a soft brush, then let it dry fully before putting it back. Hold it under running water: does water pool on top? If yes, it still has a film; wash it again.
2. Vacuum the lint screen slot. With the dryer unplugged, use a narrow vacuum attachment to remove loose lint from the opening where the screen sits. Don’t push tools deep inside or take anything apart.
3. Check the outside vent hood. With the dryer running, go outside and feel for a strong flow of warm air at the vent hood. Is the airflow weak, or is the flap stuck closed? If yes, unplug the dryer and clear any lint, nests or debris you can reach from the outside. The guide to cleaning the dryer lint screen and vent walks through it.
4. Look for a crushed duct. On an electric dryer, look behind it with a flashlight for a kinked or flattened duct, without dragging the dryer far. For a gas dryer, leave it in place and have a professional check the duct. Found a crush or kink? If yes, straightening or replacing the duct may help; ask a professional if you’re not sure.
5. Wipe the moisture sensors. If your dryer has sensor strips inside the drum, clean them the way your manual describes, which is often a soft cloth with a little rubbing alcohol or mild soapy water. Are sensor-dry loads finishing properly now? If yes, repeat this every few months.
6. Load smarter. Fill the drum about halfway to three-quarters, and dry heavy and light fabrics separately. Shake out items so they don’t go in as one tangled ball.
7. Check the washer’s spin. Lift clothes from the washer after a cycle. If they’re dripping, the washer may not be draining or spinning well; see washing machine not draining. Are clothes much drier now after the wash? If yes, drying time should drop too.

If clothes are still slow to dry and the air in the drum feels only lukewarm, read dryer running but not heating next.

When to stop and call a qualified technician

Contact a qualified appliance technician, or the manufacturer’s service network, if:

• Drying is still slow after you’ve cleaned the screen, cleared the vent hood and fixed loading
• You notice a burning smell, smoke, or scorched fabric
• The cabinet or the top of the dryer gets very hot to the touch
• The vent runs a long way through walls or the roof and you can’t reach it
• It’s a gas dryer and the duct or connection needs attention
• A vent or error alert keeps returning after you’ve looked it up in the manual

A professional dryer vent cleaning service can clean long or hidden duct runs. Don’t attempt anything that requires opening the dryer.

FAQ

How long should a normal dryer load take?

It depends on the load size, fabric and the dryer’s design, so there’s no single right answer. Your manual usually lists typical cycle times. If loads suddenly take much longer than they used to, something has changed, most often airflow.

Do dryer sheets make drying slower?

They can leave a thin film on the lint screen that slows airflow over time. Washing the screen with warm soapy water every so often removes it.

Why are some clothes dry and others still damp?

Mixed loads are the usual reason. Thick items like towels or jeans hold more water than light shirts. Drying similar fabrics together gives more even results.

Is a slow dryer a fire hazard?

It can be. Slow drying often means lint is building up in the vent, and lint burns easily. Clean the lint screen every load and check the vent regularly, as the U.S. Fire Administration recommends in its appliance fire safety tips.