This is something I see way too often: some guy uses the toilet, walks up to the sink, trickles some water onto his fingers, shakes them off, then walks out of the restroom. Yuck. That does almost nothing, you impatient, gross monster.

Today's burning question is a collection of dental quandaries that grew out of a discussion among Lifehacker staffers, where it turned out that each of us -- and some of our dentists -- have very strong opinions on the right time and order for the various steps of dental hygiene. The more we chatted, the more confused we became.

Is your home always stocked with the cushiest brand of tissues, toilet paper, paper towels and napkins? Good, stop reading. Everyone else: This is a remedial course in how to fill your home with paper hygiene products like an adult. I realised the importance of this course when discovering that several of my younger friends don't buy tissues. Before you send another guest to the bathroom to blow their nose, please read.

The lemon wedge in your drink has a bad reputation, and the evidence for it seems obvious: No one at a restaurant washes the outside of a lemon, but then they throw that wedge onto your glass, sometimes letting the rind soak right in the drink. And according to HuffPost, several studies found all kinds of germs on lemon wedges from bars and restaurants.

So should your drink order always include "No lemon, please"?

Clipping nails, especially thick toenails, often leads to an unwanted acrobatic performance. Nail bits go flying everywhere, never to be seen again. Here's how you can stop that.

We spend a good portion of the day using our sense of hearing, but we know very little about how to maintain our ears properly. There's a lot of confusion out there about how to properly take care of our ears and maintain earwax, so let's set the record straight.

Stifling a sneeze may be the purest, simplest body hack. We've posted a couple of methods before (pull on your nose, put a finger under it, or bite your lip), but I've always relied instead on pressing my tongue on the roof of my mouth. (You can also tickle instead of pressing.)

Some people squat over a public toilet, because they have quads of steel. Some people just sit their bare tushies right down on the rubella-covered seat, because evidently they have no fear of germs as sensible people should. For the rest of us there are toilet-seat covers. Yeah, you can cover the seat with TP, but the careful tearing, angling and placing of lengths of paper for perfect coverage can get a little tedious when you really need to go -- what is this, macramé?

People who don't have hand towels in your bathrooms: What do you think your guests dry their hands on?

No one can get away with white, flaky beard dandruff -- not even Santa Claus. It's itchy, unsightly, and can turn a dark-coloured shirt into a warning sign for those who might otherwise be attracted to you.

I hate going more than 10 seconds with nothing but my own thoughts to entertain me. When I walk three blocks, I listen to a podcast. I read Twitter while I pee. What I hate the most is brushing and flossing. I can't hold my phone, I can't talk, I can't admire myself in the mirror because I'm foaming at the mouth. I can't stand it as an adult, so imagine how hard it is for a child.

The human nose can detect more than one trillion distinct scents, but it isn't so great at picking up your own odours. There's always a chance you reek something foul and just don't realise it. If that's a fear of yours, here's how you can find out for sure.

The cool thing about eyebrows is they come in all different shapes and you can hone that shape by plucking or filling them in. A simple tool can help with this and you probably have it lying around the house: A spoon.

The worst food poisoning I ever had was a few days after returning from a weekend getaway with friends. When I finally dragged myself out of the bathroom after 24 hours of hell, an email from one of my besties was waiting for me: "Is everybody else feeling OK? I know our dinner together was a few days ago so I'm sure it's not that, but I just wanted to check."

My university roommate and I stood worlds apart. She'd slap some body lotion on her face, as in lotion left over from her arms and legs, straight from the pump bottle. Meanwhile, I moisturised with special facial moisturisers. I thought she was doing more harm than good, but her method wasn't as harmful as I thought.

Flaking, itching, taught and drab-looking skin are just no fun. Some, like yours truly, struggle with it more than others. We can blame our genes up to a point, but there's a lot we can do on our own for good-looking skin, like following a skin care routine that includes moisturising.

Putting on a little fragrance at the beginning of the day and expecting it to stick around through the day and through an evening event is a bit of a tall order, but Aaron Marino, of IAmAlphaM, has a very simple (and almost obvious) trick to help it last longer -- and thankfully it's not "just apply more." Moisturise.

Every shower you take costs a little bit of water and a lot of power to keep that water warm. If you've ever wondered just how much your shower habits cost, this calculator can help you figure it out.

Picking your nose probably won't kill you, but it's not exactly a healthy habit either. Not only does picking your nose look gross, it could be leaving the door open for dangerous bacteria that want to call your nose home.