Why does my nail hardener leave a rough and not smooth finishing look?

I purchased a clear, glossy bottle of nail strengthener. I like the clean, glossy look, but lately can't seem to get my nails to dry smooth. They look rough...or coarse.Why does my nail hardener leave a rough and not smooth finishing look?
I've noticed this when I paint my nails with my mom's polishes too and since she's a manicurist, she said that it was because the polish is either too thick, old, or because of the weather. if it's too thick, you have to buy some thinner at the beauty supply store. it's a really big bottle for cheap prices (like 5 dollars). you can also use it for a long time. just put it in the polish and shake or roll it around. if it's too old, the thinner might work, but your best bet is to throw it away and get another. nail polishes expire after 2 years. if the polish isn't thick, it's the weather. if it's too hot, it might cause the nail polish to dry before you can put it on you nails, so that's why it's like that. it can also be that you dried your nails with a fan. i know that it's instinct to dry your nails with a fan, but in hot weather, just air dry. and stay in a cool place while drying. it may also be because of the application process. when you apply any kind of nail polish, don't take a lot on the brush. just take enough for one stroke.Why does my nail hardener leave a rough and not smooth finishing look?
Your nail strengthener might have been exposed to too much air, or might have aged a little (make up and nail polish does 'go bad'). Even if it's new, it could have been sitting on the shelves for months. Try adding a few drops of nail polish remover to the bottle and shaking it a few times. If it's still going on in globs or all rough, it might be time to get a new bottle.
i am going to be very honest with you ok i just finished going to school to do esthetics and depending on where you got it from it is most likely not doing anything for your nails buy drying them out And that is why your nails look Rough and coarse . Now if you got it from a drugstore then chances are it is no good and if you got it from a salon then it may actually work try going to a salon near you and asking for something called a nail conditioner they really really help .