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Normally our experts would advise that you follow the specific instructions that are given in the owner’s manual. However it may be that the original sensitivity is not really appropriate for you. Too much responsiveness can lead to accidents. Look for a setting that is comfortable for all the main users of the garage door.
It is important to keep your garage door free of rust at all times. Rust may be caused due to non-frequent use, extensive periods of use or due to certain climatic conditions. Maintaining the garage door on a yearly basis and checking for rust, will help to prevent its occurrence. Seek professional help if needed.