tossik, You don't say where you are, but it's possible there's an APUG member close to you who would let you try a different lens/see if yours needs replacing.

I have found that some enlarger lenses age, & deteriorate, all of mine were in a commercial darkroom, I cleaned carefully but other probably didn't, If I can see the differences in prints, those lenses are retired, in fact the lenses I'm using now optically look like new

Ian