Not much info I could find on what surfaces do cockroaches are unable to climb - nor I have read much into their precise methods of how do they climb stuff, however on this website: https://www.terminix.com/blog/bug-facts/can-cockroaches-climb/ they mention that the following give cockroaches a hard time climbing: Porcelain, Glass, Smooth metal, Granite, Marble surfaces.
So from what I gathered two things came up to me on how to prevent these bastards to climb onto something, in my case - I don't want them to climb up on my bed.
1.) Coat a slippery surface on my normal surface (bed legs, however I don't have bed legs as I have a box bed).
2.) Spray the bed legs (better if you have box bed) with a repellent like pepermint or eucalyptus, which btw I have no idea how effective these are at all or how long do they last, as the sources where I read this weren't really factual.
Do you guys know any other way on how to prevent them climbing on my bed? If method 1 is ok, what material should I use - I thought of wrapping up transperent tape around my bed but not sure if that counts as slippery. I know it will look terrible, but the crawl of a cockroach shell waking you up and presenting itself to you is far worse image than anything else and a far worse nightmare than the one you were waken up from. I thought about sticking some other material to it, but I really don't know what will work - I have oriental cockroaches why do not fly. Also if anyone tried method 2, is this legit, how long does the effect last for?