Check your manual/documents. Using non HE detergent may void your warranty.
HE washers use so little water that you must also use very little detergent. You can use regular liquid detergent, but no more than 1 tablespoon for the largest load size. Less for smaller loads. HE detergent is made to not suds much, so if you're getting a lot of bubbles with the regular stuff, use even less. You may also want to do a second rinse cycle if your machine has that setting.
When the machine is not in use, always leave the lid up and any dispensing cups/trays open. This is how you avoid the stinky HE washer problem. If there is any residue left in the cups, wipe it out. Run a cleaning cycle with hot water and Affresh or similar every month.