When purchasing a top quality hair dryer, there are several factors to consider, GH Beauty Lab scientists say: All of the robot vacuums we review are subjected to both our lab tests and in-home, real world use over several days. The test results, user experience, price, and features relative to competing models weigh into our overall star rating. Wattage. A hair dryer's wattage determines its power: The Beauty Lab recommends a range of between 1,500 and 2,000 watts for best results on any hair type (1,875 watts is the most common hair dryer wattage). Nylon can also be effective and some tools mix both nylon with boar, like the Oribe Flat Brush. Plastic is okay, though it won't hold up as well and can cause added friction (and therefore added frizz) to strands.

Design attributes. In GH Beauty Lab testing, we take into account each hair dryer's weight, the length of its cord and its noise level, which can affect ease of use. A djustable heat and speed settings, which allow you to customize the level of heat and power the hair dryer emits according to your hair type and preferences. Vacuuming is one of the 7 ways to remove pet odor from your home. How much should you spend on a robot vacuum? Some robot vacuums can only store one map, which is frustrating if you need it to work on more than one floor. That’s why they’ve now introduced models which can record maps for multiple floors. One thing – aside from price – that sets the Roomba i7+ apart from the Roomba s9+ is its gentle navigation. In my tests, I noted that the vac barely disturbed the dog food bowls in my kitchen while cleaning around them. The Roomba s9+ was a little more aggressive, pushing the mat and bowls askew from their usual location.Remember: The smaller the barrel, the tighter the curl. So if you're looking for something to help straighten out your hair or achieve that wispy curtain bang look, go for a large round brush between two and three inches wide. And if you're looking for something to flip out your ends or get curled layers, go for a narrow round brush under one inch or less in diameter. Meanwhile, if you want the best of both worlds, try a medium-sized round brush around one or two inches wide to smooth out your hair while creating some volume at your roots, says O’Connor. Keep your hair texture in mind The base is lightweight and easy to manoeuvre around the hair but feels robust, and warm and pleasant to hold. The cushioned base protects the scalp and the flexible bristles won’t snag on tangled hair. It’s a great option if you’re avoiding plastic or would like a detangling brush that’s also good for use when blow-drying.

However, there were some areas for improvement — specifically the mapping experience when dividing up rooms, and the controls of the mopping function. But, if room-specific cleaning isn’t a concern, then it’s worth your consideration. It comes with four levels of suction power and getting it set-up and running couldn’t be easier. Curly hair (from 3a to 4c curl types): Look for an ionic hair dryer that comes with lots of attachments. "A diffuser is a must for all curly and kinky hair types who wish to embrace their natural texture and a narrow nozzle attachment if they want to smooth it," Wizemann says. The more bristles, the more control (tension) you get when you blow out the hair," Savano explains. "The fewer bristles, the more airflow you get, so less control but a faster blow-dry." Additionally, she recommends natural over plastic bristles and ceramic instead of metal barrels when blow-drying. For wet hair, plastic is usually the way to go. It's important to consider suction power, as this will determine how thorough your cleaning results will be. Ideally, a decent robot vac should have a suction power of at least 5,000pa to be able to handle pet hair and dander with ease.One raved, "On the most humid of days, it got hair smoother, and in less time, than any hair dryer I've used." Another echoed: "The air pressure was great and I do feel like it dried my hair faster than normal." If you have hair that’s prone to more serious tangles – dry or damaged hair and curly or coiled hair is more susceptible to knotting and matting owing to the increased friction between strands caused by a raised cuticle on the outer surface – then a specialist detangling brush or comb will help by working harder to separate the strands.

Round brushes like the It's a 10 Miracle Round Brush are best suited for styling, as they create a lot of volume in the hair. Rectangular brushes like the T3 Smooth Paddle Brush, meanwhile, are good for those with straight hair (those with curls may find that the paddle style pulls or tugs at strands a bit too much).

The bald patch 

Anthony Naderis a celebrity hairstylist and the salon owner of Raw Anthony Naderin Sydney, Australia.