Replacing a patio door lever is actually a fairly simple project that anyone with basic knowledge of tools and hardware can do. To begin, you'll need to purchase the new lever handle, which should be compatible with your existing lockset. Once this has been acquired, start by removing the old handle from the door. Take care when doing so not to damage or lose any screws or small parts in the process. Next, use a screwdriver to remove any remaining pieces from around the door’s frame before inserting your new lever into place and fixing it securely using screws or bolts depending on its design. Finally, test out your newly installed patio door lever for security and proper operation before reinstalling any interior trim or weather-stripping if necessary. With these easy steps complete, you should now have yourself an upgraded and secure patio entryway!