Riqs and Daffs must be taken care of much the same as a drum. In the past few decades riqs and daffs have more commonly been made with plastic or mylar heads as oppose to animal skin heads. If you have a newer riq or daff with a replaceable mylar head you will need to have the head changed and possibly tuned. Those with animal skin heads will either have to make or buy their own replacement head. I have found it is harder to find the animal skin replacements. Once you have your animal skin head you can put the head on yourself or you can pay an instrument repair shop to do it for you. If you do it yourself look to see how the previous head was put on and apply the new head in the same fashion. I have found the most common ways to attach a head are to glue it onto the frame or to attach it with little push pins. No mater what you will need to pull the skin taught with little or preferably no slack. Once the head is attached check to see if it is taught or if it has to much slack. If there is a small amount of slack then you may try to heat it up by holding it close (not in) to fire or an immense heat source such as an open oven. This causes the skin to tighten and shrink. If, however there is a lot of slack then you will have to take the head off and start again pulling tighter then before. You may also use the firing method once your head is older and has stretched from play to tighten it up again. Plastic or mylar heads are sometimes harder to tighten some may have a way for you to tighten them but if the head on your riq/daff is loose it's best to just change them. You can have someone from an instrument repair shop do it for you or you can do it yourself. I have taken mine to MARS and they changed it for me.
