Traps, anti-slip means

We have a dark brown, very smooth spiral staircase with no railing of the kitchen in the basement and a toddler there himself up and down runs - that's why we bought the transparent anti-slip strips as a backup. I wanted a solution that is truly permanent, our socks not break something and be seen as little as possible. For two weeks, the strips are now attached. Here is an overview of pre-and disadvantages:

Advantages
- You slide significantly less than before with socks
- Attaching went easily and quickly
- The socks are not damaged
- So far no impairment by brushing / vacuuming

Disadvantages
- Depending on the stairs depth you need at least two strips in succession, otherwise you still slips away on the heel
- The skid resistance is OK, but I had wished for more "stopper" effect (the strips have no rubber, more of a feeling as you walk on soft sandpaper).
- That his name does not do justice transparent; It is very striking on our staircase and makes this not just more attractive
- The price is very high

I would Strips due to the price (for best results, we would have two packages for our 14 steps required = 80, -) not for sale and not quite as convincing product properties again. Maybe a rugged carpet strips would have been cheaper and also more effective ..?