Check the slough, assuming you still have it after a week, to confirm that the r/h eye cap did not come off while the l/h did. You can try the suggestion given. If they do not work and you cannot find someone experienced to show you, there is one technique that is conservative to recommend. Do steer clear of techniques that advocate using adhesive tape sticky-side-out around your finger and any hard pointy objects such as tweezer, forceps or the likes to force removal.
For an unshed eye cap to be removed it must first be thoroughly moistened so that it separates from the skin layer beneath. This can be done by applying a drop or three of normal saline, artificial tears (from a pharmacy) or Visine, applied and left for a few mins and then repeated for good measure. Slightly moisten a cotton ball with the same fluid, then very gently drag it across the eye, from front to back, in one slow continuous motion. This action should remove it within two or three wipes. If it only comes partly off, moisten the stuck section of the eye cap and repeat the procedure. Do NOT try to pull or peel it off.
If the above does not work, then leave it to come off with the next shed, for which you would bump up the humidity to help. If the eye should become inflamed or watery at all in the meantime, which is not usual, then it’s a visit to the vet.