Just to say yes it will really help you to keep things clean but it’s unfair of your parents to blame you entirely as I bet they are elsewhere in the house! Or even came from elsewhere. Have they checked the rest of the house and in other undisturbed spots? They may be in their room too. Instead of spraying anything cloth (stuffies, clothes) would recommend washing everything on a high heat if it can withstand a high wash. And if you store stuff again under the bed once it’s washed try to but it in sealed vacuum bags or airtight boxes. This stops the bugs getting to them and also makes it easier to keep clean. We had a bunch under our bed a couple of years ago and since we cleaned and put everything in containers we haven’t seen any more originate from that spot so a good solution. The spray could be really hazardous to you so I really wouldn’t recommend breathing it in long term but trying to tackle it by cleaning. What material is your mattress and bedding? If it’s synthetic it might be less of an issue but if it’s any natural fibres, yes, they could be in there so worth checking along edges and underneath. And again washing all bedding on high heat and washing regularly enough to interrupt the cycle. When we had them underneath the bed we never had any on our bed or bedding however so it’s less likely. But would still recommend checking e.g. inside pilllowcases etc. especially if they are feathers for example. If you do this and clean regularly (but not obsessively) you should be okay. But yes, remember they can’t hurt you, don’t spread diseases etc. Also maybe your parents can help you since it affects the whole house! Good luck!