Update maintenance.md

docs/maintenance.md

@@ -21,7 +21,9 @@ If you're using the machine not that often, you still should pay attention. In t
 
     People use to think WD-40 is the perfect solution for pretty much everything, but they aren't aware of the fact that -due to the chemical recipe it's made of- it's absolutely not sufficient for getting parts lubed mid- to longterm. Fact is, that the chemicals inside of it will even wash off any grease or oil, it can harm POM and rubber and so on.  
 
-    As an example: So let's say you want to lubricate your bike chain and use WD-40 to do so, you'll basically *wash away* the existent lubrification  which is inside the chain - therefore the chain will be worn out pretty quick. You'll also harm the sealings. If you don't believe me, make a little test by yourself: take an air baloon, pump it up, spray WD-40 onto it and wait..  
+    As an example:  
+    So let's say you want to lubricate your bike chain and use WD-40 to do so, you'll basically *wash away* the existent lubrification  which is inside the chain - therefore the chain will be worn out pretty quick. You'll also harm the sealings.  
+    If you don't believe me, make a little test by yourself: take an air baloon, pump it up, spray WD-40 onto it and wait..  
 
 
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