Detecting exploits isn’t always easy since you’ve got to be actively looking in to the new exploits which could bypass what you’ve made. This is where scripting comes an important role because you have to use the best of your resources to defend your game against exploiters.
Assuming you’re new to scripting, you should look into validating user inputs which you can check here: Tutorial: Properly Validating User Input
Do not fret, because ROBLOX are actively mending these issues to combat these exploits. Its best you keep consolidating in your code that the user input data is correct and accurate.
If you need any more help, make sure to use #learning-resources as a pinpoint for collecting useful information about combating against exploiters. In addition, do not hestitate to private message me or the other helpful users who’ve replied on this thread!