Bottom of dirt container doesn't stay closed

1. Make sure to turn off your machine.
2. Press the empty button. Then pull the handle to lift the dirt container away from the vacuum.
3. Hold the dirt container over a trash bin and press the release button to dump the debris.
4. Then snap the bottom back on.
5. Place the dirt tank back onto the machine.

http://www.homedepot.com/catalog/pdfimages/e1/e1548aa7-3a91-42bc-b2c0-1b405ef54686.pdf

This owners manual shows you how to empty. If you dont have access to Internet:
1. Depress the dirt cup release button and pull nozzle away from unit.
2. Hold nozzle over a wastebasket, Grasp filter and gently pull out.
3. Shake excess dirt and debris out of dirt cup. Brush the dust and dirt off the filter or shake inside the wastebasket. IMPORTANT do not wash filter.
4. Gently push the filter back into the dirt cup.
5. To reattach dirt cup: Align bottom first and rotate nozzle up until it snaps into place.
Good luck.

There is a lever that has a hook on the end that holds the door in the bottom of the dirt cup closed. If the little plastic hook gets broken the trap door will not stay closed by itself. The easiest way to fix this is to purchase a new dust bin. I have a bunch of them in my vacuum graveyard. You may call my store at 260 244-4696.

Hi! Here are some basic trouble shooting steps for the Presto 2-in-1.

1. Remove the dirt cup. Push the release catch on the hand vac and pull the dust container off the motor unit
2. Remove dust container from filter assembly and cyclone separator.
3. Hold the dust container over trash can and tap out debris.
4. Check cyclone separator for additional debris, empty into trash can
5.Check the rinsable filter. If rinsing is needed, remove rinsable filter, rinse with pleated side facing up. Allow filter to completely dry for at least 24 hours.
6. Remove any hair and debris from the brush roll.
7. Remove the floor nozzle from the cleaner by pressing the nozzle release button on the back of the floor nozzle and pulling from cleaner.
8. Check and clear nozzle of any obstructions.
Hope this helps!

1. Push down on carry handle and
pull dirt container away from unit.

2. Once it is pulled back lift it out.

3. Hold dirt container over trash can and push down on bottom
release lever to release debris.

4. Close bottom cover on the dirt
cup until it snaps shut.

While you have the dirt container out you can also clean the Lifetime HEPA filter. It is on the top of the dirt container.

1. Twist lid to the left to remove lid and filter from
container

2. Remove foam filter from dirt container and dump out
any loose dirt. Wash the foam filter.

3. Remove the HEPA filter by Twist filter handle to the left and
pull out of lid. Wash the Heap filter.

4. Once the filters are thoroughly dry (I recommend set out for 24 hours) then installer filters in lid and thread back on top of the dirt canister.

Before replacing the dirt canister you can also clean the exhaust filter install below the dirt canister on the top vacuum cleaner head.

1. Loosen the exhaust grille by pressing the locking tab, and
remove it.

2. Remove and shake out the exhaust filter and wash it.
Note: Scented filter are not washable.

3. Once the filters are thoroughly dry relace it and snap the
exhaust grill into place.

Replace the dirt container
NOTE: Dirt container will not
align on base if filter is not
aligned properly.

The upper half is where the filter is.
Here is the manual:
http://dirtdevil.com/file/172/

Page 7 shows after emptying the lower container, "Twist and lift to remove dirt container lid."

A silver button releases the container from the vacuum. The container has a small silver button that opens the bottom of the container.....make sure you have it over a garbage bag or something to catch it.

THERE IS A PAPER FILTER THAT IS CLOGGED WHEN YOU PULL THE PLASTIC CONTAINER OUT TO EMPTY IT LOOK CLOSELY ON THE CONTAINER BOTTOM THERE IS SOMETHING THERE TO RELEASE AND THERE IS A FILTER CLEAN IT AND YOUR BACK IN BUSINESS

• There is a container that fills with dirt and it should should be easy to find on the body of the unit.It will probably have a little button that releases it so it can pull out and then you can dump it out. I think you will find the container and the button on the front of the machine that would be the side the t faces forward while you are using it and to access the container you must get in front of it to see the button.
• Thank you and I hope this will help you . Olease try to remember to click on the yes button on your way out if this helped you. Thanks for using Fixya!

Above the clear bin (canister) is the cyclone, and on top of that there's a handle. The whole bin-plus-cyclone assembly is released from the rest of the machine by grasping the handle and releasing the button that is on top of the handle where your thumb naturally falls. The trigger on the underside of the same handle releases the base of the bin (on a hinge) so the waste falls out.
You need to be careful not to squeeze that trigger until the bin is wherever you want to get rid of the waste, or else you'll end up with it all back on the floor!
You can empty the waste directly into a trash can, or enclose the bin in a plastic waste bag before releasing the waste.  After, make sure the base is properly re-secured before re-fitting the bin to the machine.  You can wipe the outside of the bin with a damp cloth.  If you wipe the inside (not necessary, but sometimes nice) make sure it is completely dry before closing the base.
I hope this helps.  I value your feedback, so please remember to rate this response.
Good luck!